Malicious PDF — malware analysis report

Static analysis result for SHA-256 34a6c861b39d6a92…

MALICIOUS

PDF

77.2 KB Created: 2021-04-09 21:05:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 00cdf877e84bda3d6655661832fec050 SHA-1: aec957e13d3b8024b847b68ef7a7256d9ff9f553 SHA-256: 34a6c861b39d6a9261c7d3f915de79764c845d48af960b1803400c57c3e7ecef
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, including one that redirects to a link farm hosted on disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of external URIs and a link farm heuristic suggests the PDF is part of a larger campaign to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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.
  • 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/strik?utm_term=what+does+the+magician+mean+in+a+tarot+reading PDF link annotation
    • http://gamukanemafutu.mywebcommunity.org/great_love_story_book_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454163/normal_60486de2cad59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452161/normal_600cb82779994.pdfIn PDF document text
    • http://gazajujana.mygamesonline.org/human_anatomy_drawing.pdfIn PDF document text
    • https://riluvozig.weebly.com/uploads/1/3/4/3/134380056/df5ee.pdfIn PDF document text
    • https://teparapilaw.weebly.com/uploads/1/3/4/4/134477765/e6601f3ff360.pdfIn PDF document text
    • https://cdn.sqhk.co/jesupasuzoku/xgf3IIn/south_movie_only_music_ringtone_download.pdfIn PDF document text
    • https://niromegezos.weebly.com/uploads/1/3/2/6/132681660/2090196.pdfIn PDF document text
    • https://kisetizep.weebly.com/uploads/1/3/5/9/135992433/1915454.pdfIn PDF document text
    • https://cdn.sqhk.co/wabasenenem/fuhfwic/hexagon_fall_guys_gameplay.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383915/normal_5fdc75e3ab316.pdfIn PDF document text
    • http://nijalatol.mypressonline.com/78093691067.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389365/normal_6043bcf145d27.pdfIn PDF document text
    • https://cdn.sqhk.co/nokulebepoba/rVxggJj/brothers_in_arms_game_for_java.pdfIn PDF document text
    • http://jonebukusopovet.mygamesonline.org/jurigamaloronida.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/tumasun/nesegokigorarizawum.pdfIn PDF document text
    • https://s3.amazonaws.com/nakuzafol/33060849747.pdfIn PDF document text
    • http://pofitubawonu.atwebpages.com/glencoe_advanced_mathematical_concepts_precalculus_textbook.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/foven.pdfIn PDF document text
    • https://s3.amazonaws.com/dazinibonofobi/48841486981.pdfIn PDF document text
    • http://xenexafa.myartsonline.com/48796350688.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_off0000efed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFED 5336 bytes
SHA-256: f3f200057f42829c98b8dd1fdb75072aa0836a47e3ec33f4fc73519a4623f0af
font_01_sfnt_off000101f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101F7 10888 bytes
SHA-256: 0a2e378643905ef27dd0c651198d333d1679e8d2747a122c034acd20258aba28

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