Malicious PDF — malware analysis report

Static analysis result for SHA-256 60c881425f2a51d3…

MALICIOUS

PDF

78.1 KB Created: 2021-02-28 17:09:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c9dce1c92ee61ab8cad3f7f374c401b2 SHA-1: ef733ff95e9801839e215f929b5b59a3c23f333c SHA-256: 60c881425f2a51d357f1d755349dd44050891a245e861310ea9478cc622f87b3
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it is part of an SEO link farm designed to redirect users to potentially harmful websites. The document body, though heavily obfuscated, appears to be related to search terms, reinforcing the lure strategy.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://jottigo.ru/award?keyword=healing+is+voltage+pdf+free PDF link annotation
    • http://dashcamtopbest.com/kuvir1fsr6.pdfIn PDF document text
    • http://cleaner360.shop/gloud_games_pro_mod_apkr00il.pdfIn PDF document text
    • http://mainsale.info/fajesubanuviruvubab0pxrd.pdfIn PDF document text
    • http://lolkek.xyz/menojamomeuub.pdfIn PDF document text
    • https://kosazalosir.weebly.com/uploads/1/3/2/8/132815054/pepozaj_wezakevuva_posijuzapika_dokimikifure.pdfIn PDF document text
    • http://zerkalo-fugicar.website/yamaha_mg20xu_reviewnue7x.pdfIn PDF document text
    • https://rifuxegu.weebly.com/uploads/1/3/4/5/134525143/5908621.pdfIn PDF document text
    • http://begemotiks.space/how_to_stop_smoke_alarms_from_beeping2v1u8.pdfIn PDF document text
    • https://nofakefol.weebly.com/uploads/1/3/4/3/134341926/sugaxete.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/purixifusipelid/learn_english_speaking_app_for_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pevarijidasalop/zofelutugajozoge.pdfIn PDF document text
    • http://weferobiditikun.epizy.com/best_mod_apk_app_store.pdfIn PDF document text
    • https://s3.amazonaws.com/zumomasugipeno/15423060009.pdfIn PDF document text
    • http://lojiwifi.epizy.com/72090636916.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/31097098805.pdfIn PDF document text
    • https://s3.amazonaws.com/zabejuvijolu/android_mobile_livescore_app.pdfIn PDF document text
    • https://s3.amazonaws.com/megodipewukitoj/princeton_review_gre_premium_prep_2021.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_off0000f3e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E0 5228 bytes
SHA-256: 3e8e20d3360ed480d1343f9a7d2f502e3000d5b6445d69564163db445431e640
font_01_sfnt_off000105c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105C4 11224 bytes
SHA-256: 3e4eb073a563c3a509d3d0f213a49edb98f651c9eacce0a39fb2ab9faed6df7a

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