Malicious PDF — malware analysis report

Static analysis result for SHA-256 63e2254e4f2483cc…

MALICIOUS

PDF

81.3 KB Created: 2021-09-13 02:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b1f78be20c8d666ffb6ce735a3f30f94 SHA-1: 766c2b3b509b4c951a25c1f7f148e21a04ce78c7 SHA-256: 63e2254e4f2483ccb766601c571962398dddc529dc49466b443cdf54d908d924
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The file contains numerous embedded URLs, many of which point to compromised CMS upload storage or disposable hosting, suggesting a link farm designed to redirect users. The presence of a 'download button' lure further supports the phishing or scamming nature of the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=gta+sa+retexture+mod+android PDF link annotation
    • https://al-farh-iq.com/upload/userfiles/file/43024545281.pdfIn PDF document text
    • https://www.sistemkabin.com/ckfinder/userfiles/files/beruxaroravonutaso.pdfIn PDF document text
    • http://rasmesafar.net/basefile/basefiles/weketuwofowes.pdfIn PDF document text
    • https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ca08536e5a---xojiwedusar.pdfIn PDF document text
    • http://mt-filtration.com/uploaded/file/44552691261385ce8030e5.pdfIn PDF document text
    • https://textolinguisticsolutions.com/upload/editor/file/9513744188.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130a7840d188---17777027323.pdfIn PDF document text
    • http://boonfagrandhome.com/user_img/files/83820934316.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/2ancbt7s03r00dlbsa9ebkh575/renoxuwasufe.pdfIn PDF document text
    • http://ohmytour.kr/FileData/ckfinder/files/20210904_2CAA9E28DEF9B18C.pdfIn PDF document text
    • https://www.champagne-auge-dascier.com/ckfinder/userfiles/files/riwigibigereporij.pdfIn PDF document text
    • http://stellarp.com/userfiles/files/jadamidibarutufageta.pdfIn PDF document text
    • http://benetalent.com/upload/files/bubasajepozajetud.pdfIn PDF document text
    • https://maintogelonline.bet/contents/files/parukojok.pdfIn PDF document text
    • http://acevina.com/webroot/img/files/gusorulezinurawez.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1613a91e22a073---41447863465.pdfIn PDF document text
    • https://www.libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/14979336456.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ff82182b72---vozisutasiwaga.pdfIn PDF document text
    • http://amghanoi.com/images/ckeditor/files/ludulozugel.pdfIn PDF document text
    • http://nilesk.com/userfiles/file/zaropalobi.pdfIn PDF document text
    • https://hyundainhapkhau.vn/upload/files/74645129559.pdfIn PDF document text
    • https://www.fangjin.org/ckfinder/userfiles/files/rimadozufitudenoku.pdfIn PDF document text
    • http://smenergy.kr/uploaded/file/1148070177613d05b2ee156.pdfIn PDF document text
    • https://mr-alian.com/upload/ckfinder/files/80443253279.pdfIn PDF document text
    • http://nuovojob.com/userfiles/files/luvagajavumavagexexixa.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_off0000db3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB3B 16792 bytes
SHA-256: 58fb785158fa8ed84b9489afb61bfc68cc4b8484ef4c8ffb3938dbcdddf52ced
font_01_sfnt_off000106f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F6 10604 bytes
SHA-256: 315d47abcb34206d4d6449cdd9c9aaa99b54d23b1d9109e586dc1b28a2096b83
font_02_sfnt_off00011f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F40 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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