Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c894ea8fd915f3b…

MALICIOUS

PDF

67.9 KB Created: 2021-02-25 02:41:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 2d8a6452403c1c530e85ffb8884dd5e1 SHA-1: 16492d019f99e45d250ea3096def60c229253024 SHA-256: 1c894ea8fd915f3bdde60636ca5b0d69dd543011a0657114315718fe455fb87d
156 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on Weebly and sqhk.co domains, suggesting a link farm or phishing operation. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically as a phishing trojan. While no scripts were explicitly extracted, the PDF structure and numerous external URLs point towards an attempt to redirect users to malicious content, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=wayne+dyer+videos PDF link annotation
    • https://fazotevepokok.weebly.com/uploads/1/3/4/8/134865813/8409952.pdfIn PDF document text
    • https://cdn.sqhk.co/rarinuva/cA0Wche/virus_news_today_usa.pdfIn PDF document text
    • https://jetukuzimol.weebly.com/uploads/1/3/2/6/132695660/a7140ae2e2a0.pdfIn PDF document text
    • https://fakanodadix.weebly.com/uploads/1/3/4/3/134371587/rotemagaro.pdfIn PDF document text
    • https://cdn.sqhk.co/dufelogaruf/0eujfjc/retro_racer_game.pdfIn PDF document text
    • https://cdn.sqhk.co/xemugugafot/FBmidtE/retrowave_wallpaper_4k.pdfIn PDF document text
    • https://zugozoriv.weebly.com/uploads/1/3/4/7/134770463/6c2201ee5.pdfIn PDF document text
    • https://cdn.sqhk.co/leruwexikud/TjckhgY/14083651713.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417046/normal_5fc768cc85bb8.pdfIn PDF document text
    • https://cdn.sqhk.co/muxigatatini/aVJjaib/8094292577.pdfIn PDF document text
    • https://mebedepubini.weebly.com/uploads/1/3/0/8/130813558/veziduke.pdfIn PDF document text
    • https://cdn.sqhk.co/wujozuzewed/bidzTAy/limakuvizulizuwil.pdfIn PDF document text
    • https://cdn.sqhk.co/funuwovo/c0gftJA/nefezojadudesabamub.pdfIn PDF document text
    • https://cdn.sqhk.co/gupetipek/ajik9Gs/44144038790.pdfIn PDF document text
    • https://cdn.sqhk.co/wesaduleb/bzs3SZX/bosu_ball_balance_exercises.pdfIn PDF document text
    • https://cdn.sqhk.co/dowusutitozi/7jh8SVa/quiz_planet_game_on_facebook.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/b4E4ZHg/16154748421.pdfIn PDF document text
    • https://cdn.sqhk.co/rogapakaler/hahb4je/friends_international_christian_university_merced_ca_95340.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000cf71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF71 4964 bytes
SHA-256: 47954ebaf652429b9cfe6fffbf6cc242aba61103ac152a404161037a5dc2867d
font_01_sfnt_off0000e079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE079 10028 bytes
SHA-256: 629f1ae20928395735568b03555a911a5786682fa0826cb0ad90d048046cc725

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