Malicious PDF — malware analysis report

Static analysis result for SHA-256 86f801f362159063…

MALICIOUS

PDF

89.4 KB Created: 2021-07-08 04:29:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 677537c0d89fe94658bdf4cc6628c6a2 SHA-1: bced5a0f698694f0aad7966a13b1b194020f1551 SHA-256: 86f801f362159063fecfda3515d11c26da00806a4daa887cf670845cd6e6ecfe
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure align with a phishing or malware distribution tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://crysiq.ru/uplcv?utm_term=small+ant+hills+in+yard PDF link annotation
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160c5da5ddc7ac---76626663400.pdfIn PDF document text
    • http://theydeserveastamp.org/wp-content/plugins/formcraft/file-upload/server/content/files/160cff55361b0a---posidapodebolunewevijuji.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/kamumuriz.pdfIn PDF document text
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/5c92078db2b63c3b006eace1b0583dd0/lazoterobusefererinude.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/xulukesagosezot.pdfIn PDF document text
    • http://opalsolar.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16094730b21f6b---43645397054.pdfIn PDF document text
    • http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c36da2bac43---2076866067.pdfIn PDF document text
    • http://atomiccm.com/userfiles/files/29524577463.pdfIn PDF document text
    • http://billsky.ee/files/file/zotamopidagadujadod.pdfIn PDF document text
    • https://alternativecarrepair.com/userfiles/file/kujawuzezakikovowumo.pdfIn PDF document text
    • https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecad19eb62---wevewibegaramivedefuxifi.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/5122b2206de9605c0951fe8241984b09/rejuvonabowuxu.pdfIn PDF document text
    • http://ahcxdq.com/uploads/file/29141304695.pdfIn PDF document text
    • http://www.supercarrentalsofmiami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881ae842b43---tuzapupezixusamatop.pdfIn PDF document text
    • https://nscs.org/wp-content/plugins/super-forms/uploads/php/files/27166941f07a60076178e40a166c4cb6/welunadap.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfc1f76f2ec---37179621280.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/8aa1defd091031a5ad7f431a4235d38c/5626592185.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/3fa1d99d8525c432e8f72d660835f686/mirajakomirusumojob.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/e00b18d9998ce235e2caf49bcbbb010a/53366229706.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/giposepudekuku.pdfIn PDF document text
    • https://www.hotwaterfactory.com.au/wp-content/plugins/super-forms/uploads/php/files/5b92c4b293b527b5e59e699fc21f413f/lobujifunaramap.pdfIn PDF document text
    • http://slenderclub.cz/ckfinder/userfiles/files/52304992040.pdfIn PDF document text
    • https://www.expoagrogto.com/wp-content/plugins/super-forms/uploads/php/files/bn4pfa67ak1q1jiif855eeirl5/45526582973.pdfIn PDF document text
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072acb665181---vefufigadogesejeb.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC39 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00011450.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11450 10452 bytes
SHA-256: 8da022d6c507406c2c7352973265dfd7dc7eb09a356da79ff6ebee32d25eacf2
font_02_sfnt_off00012bba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12BBA 16940 bytes
SHA-256: 11b80589845639a873c8c08da05bbb917c9198a8b34c797e1aeb129e8f295ad7

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