Malicious PDF — malware analysis report

Static analysis result for SHA-256 05258aa7b2e10f09…

MALICIOUS

PDF

90.6 KB Created: 2021-07-01 12:17:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: f111c1c632c049aee3aa3595b361f3b3 SHA-1: 97c75f952d032cab6045bd923c6f6b20e43bab86 SHA-256: 05258aa7b2e10f095a3c5de07cbb27b627ae6ac1e61603bd04606867c9e11948
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of phishing and fake CAPTCHA lures. It contains numerous external URIs, many pointing to compromised CMS upload storage, suggesting an attempt to redirect users to malicious content or downloads. The document's primary function appears to be tricking users into clicking these links via a fake CAPTCHA interface.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9822

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://huntic.ru/uplcv?utm_term=last+day+on+earth+save+editor PDF link annotation
    • http://nensi.si/upload/file/95704075296.pdfIn PDF document text
    • http://playfromhome.org/clients/4/49/49939bf6a151252ba1adfe53d1befa29/File/xifilapifinevujafuda.pdfIn PDF document text
    • https://www.marvistasales.com/wp-content/plugins/super-forms/uploads/php/files/a318ff7cb49f6e761fcbaa7fb663283b/58509956066.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/bpjfemrr6fron0ed4q53p0re7d/renowinek.pdfIn PDF document text
    • http://westtech1963.com/clients/d/d4/d4250bc21dcbbf02d7f9bc68df143add/File/25956555038.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/c5db0ea6ad817e694cafa8985f14024b/73397785143.pdfIn PDF document text
    • http://bungefamily.com/clients/5233/File/sukukivik.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160711a4dc5193---40686621958.pdfIn PDF document text
    • https://flylights.pl/wp-content/plugins/super-forms/uploads/php/files/11ah0n9cagjhfk7ph7j94of13u/gurogevinof.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/89769517498.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/160a1c103563ed---dirobapexadojasavapexopi.pdfIn PDF document text
    • http://melissajacksonmd.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ea785aa28d---gotasuwom.pdfIn PDF document text
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/b018eb7ab77296987243af9aaf4fd91e/zorerivad.pdfIn PDF document text
    • https://alcc.vn/wp-content/plugins/super-forms/uploads/php/files/oth1b76c8k4sogu0ioop5fn927/zusurolujewamasobobafab.pdfIn PDF document text
    • http://fw-simple.com/uploads/files/kamezakos.pdfIn PDF document text
    • https://spark-care.com/userfiles/file/finimasep.pdfIn PDF document text
    • http://www.highlandmetals.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160cdbb15263d0---bunorawetilidakur.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083f6f86835e---96954371737.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210625_794F6C6F8C1BCFB4.pdfIn PDF document text
    • https://tamtam.com.ua/wp-content/plugins/super-forms/uploads/php/files/0c35d7cbdf149a66642619a36381a5f3/72086755832.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160d963fe5c41a---gutitatufetidigapakel.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/d2c613bbb9a2e4cbbadd96f5f454deb4/19654358901.pdfIn PDF document text
    • http://nitexprofi.cz/userfiles/file/29675761241.pdfIn PDF document text
    • http://diclenakliyat.com/userfiles/file/68105749916.pdfIn PDF document text
    • http://brandiassociati.it/userfiles/file/xovinekegaladow.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/aee3efd3a3767fe730dae266a5b8b8cf/wuvulariledisitidojuwivat.pdfIn PDF document text
    • https://reflexlighting.com/wp-content/plugins/super-forms/uploads/php/files/3f0a915906afffc3c60ad48ab69cf592/samukofuwibefuvajakazi.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11434 18456 bytes
SHA-256: 9ded851792c75f9e8859709b6451f269e3e9cf9546bccb324da9054ae5e7e39e
font_02_sfnt_off0001437a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1437A 10436 bytes
SHA-256: 9ce866205088ddebf7f9c1ce1c5fd214e15a64f6e63b70974054ef4c39b4b8c9

Open this report in the interactive analyzer, or submit your own file for analysis.