Malicious PDF — malware analysis report

Static analysis result for SHA-256 209bd61122777208…

MALICIOUS

PDF

78.8 KB Created: 2021-03-04 10:40:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 3ac277ca34989e797b865703b894c949 SHA-1: 426b4c72990f0d8680bca4df782aa58a865744ee SHA-256: 209bd6112277720838759956a95ef8e71286f228b94ab1c9b3ff0da55e0be598
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to various external PDF files hosted on disposable domains, likely to obscure the true malicious intent. The presence of a 'download button' heuristic further supports the phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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://lozipotod.ru/award?keyword=ps+vita+emulator+pc+download+free PDF link annotation
    • https://cdn.sqhk.co/daladovum/ChcNYgj/cake_maker_cooking_games_download.pdfIn PDF document text
    • http://kungfumalibu.com/93850177368ph0os.pdfIn PDF document text
    • https://cdn.sqhk.co/sosobita/vhafXpe/yeezy_supply_returns.pdfIn PDF document text
    • http://milanomoda-italy.website/jifatujejuthxq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457592/normal_601a31f01603b.pdfIn PDF document text
    • http://minuette.me/948961271161s2vz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426819/normal_600fb7a3b9234.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424632/normal_5fc7ea1aa29da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484804/normal_5fc79f222efbf.pdfIn PDF document text
    • https://cdn.sqhk.co/rejibebadit/hhjghjb/car_driving_4_hard_parking_mod_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420597/normal_602064bae2169.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_602b62527e57a.pdfIn PDF document text
    • http://hookup755.fun/volopaderujaredagi13oaq.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412573/normal_5fce5238c021e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463810/normal_5fdd79705d9d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fipinajamidab.epizy.com/xuzivukeparut.pdfIn PDF document text
    • https://s3.amazonaws.com/gopuze/tisaxumip.pdfIn PDF document text
    • https://s3.amazonaws.com/pazovugal/marathi_balgeet_video_hd.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_off0000f7fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7FB 5452 bytes
SHA-256: c5996a2a055f76315627a1c5bb9e1f1f65d52a286f20764b922a5c9d5acffc76
font_01_sfnt_off00010a88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A88 10472 bytes
SHA-256: bbf593286196264aa6243fe724dc228372d2bc3c2458133b5c392a1a10b77208

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