Malicious PDF — malware analysis report

Static analysis result for SHA-256 980e4cbb76358ee4…

MALICIOUS

PDF

74.6 KB Created: 2021-03-02 13:46:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: cf166487338a5be56fd9707d76e067b1 SHA-1: 53bf9229b2f9489e6c7119d5e28e98b0bd1f1001 SHA-256: 980e4cbb76358ee43596e3ad7e6d7ba57e28089b2fb674dd887c0feabc6dfd88
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/123?utm_term=what+is+effectual+entrepreneur PDF link annotation
    • https://gudagomafefaxer.weebly.com/uploads/1/3/4/5/134523608/regetaxipufiviven.pdfIn PDF document text
    • https://sizugive.weebly.com/uploads/1/3/5/9/135993047/68f7d85669.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/J5Ahd1I/pocket_ledger_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/labokezugumu/Gvih7jh/arcade_games_for_home_walmart.pdfIn PDF document text
    • https://vadezuposijeru.weebly.com/uploads/1/3/4/6/134660157/motikefum.pdfIn PDF document text
    • https://cdn.sqhk.co/ravusigi/C35Ioig/bowiwebuvexelasogisuwus.pdfIn PDF document text
    • https://cdn.sqhk.co/gotakavapu/BgdliaA/rope_frog_gangster_crime-_ninja_hero_fighting_games.pdfIn PDF document text
    • http://rasezatoxefu.mygamesonline.org/windows_server_2012_r2_antivirus.pdfIn PDF document text
    • https://cdn.sqhk.co/jusupovexewa/jbP4yhj/free_license_plate_owner_lookup_ontario.pdfIn PDF document text
    • https://cdn.sqhk.co/dedogupazib/ichhgf5/weed_joint_photo_maker_editorial.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lanaladu/betpawa._com_app.pdfIn PDF document text
    • https://s3.amazonaws.com/begijufadi/instagram_template.pdfIn PDF document text
    • https://s3.amazonaws.com/rawesaragegugar/98604109327.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/standard_fitted_crib_sheet_size.pdfIn PDF document text
    • https://s3.amazonaws.com/zuvovoxigumuz/74490783612.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/jukowiwufenoxumifobob.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7C0 5116 bytes
SHA-256: 05cfeac92abdcb9ff2707123a9f95f0cfbca22c1c561484c6a734ca19131059c
font_01_sfnt_off0000f932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF932 10224 bytes
SHA-256: 31617c264d69091a58e303871839a5c53f3f94fd7bd92a69a99657b55ac77f05

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