Malicious PDF — malware analysis report

Static analysis result for SHA-256 55f6d946647df55d…

MALICIOUS

PDF

82.7 KB Created: 2021-03-07 05:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: c23243d1181fdceed694e8351c11594b SHA-1: cf8e8f799b6171d292c5e888993d9fc8684ad575 SHA-256: 55f6d946647df55d86745b8cbda0957e1f32892acf5f254a38dd037f6a906c9a
126 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are disposable and hosted on suspicious domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF's structure and numerous URLs point towards a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://xajibur.ru/strik?utm_term=top+1+percent+net+worth+australia PDF link annotation
    • http://gladkoe-telo.xyz/wuluzampxxhj.pdfIn PDF document text
    • http://wulixiv.sportsontheweb.net/how_to_setup_blackmagic_intensity_shuttle_thunderbolt.pdfIn PDF document text
    • https://cdn.sqhk.co/zowolanazew/jigcoKg/50386505876.pdfIn PDF document text
    • http://prizinsta.online/89254314282s3xc4.pdfIn PDF document text
    • http://govnosiakxws.online/zikepowopiseaovn.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/jc5DgeU/78057114918.pdfIn PDF document text
    • http://memowelubi.mygamesonline.org/84765019594.pdfIn PDF document text
    • http://fejavodexata.getenjoyment.net/loxudej.pdfIn PDF document text
    • http://roserubusigiwij.mywebcommunity.org/18618030848.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470683/normal_602537e4b1c84.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417024/normal_6000b8fe4c9da.pdfIn PDF document text
    • http://gdztut.com/how_to_use_husky_3_ton_jack5cduu.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/l4jjfxT/35415850354.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412394/normal_5fc6404c4d0ad.pdfIn PDF document text
    • https://cdn.sqhk.co/nuroteditu/joAuPih/zaxapejisujidajako.pdfIn PDF document text
    • http://runmasten.online/43661814135jgt1n.pdfIn PDF document text
    • http://temppicture.xyz/639140454765y3ee.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/what_does_the_judgement_card_mean_in_a_love_reading.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/marimejerebo/lorelibipobu.pdfIn PDF document text
    • https://s3.amazonaws.com/bipovoromoj/aan_guidelines_post_cardiac_arrest.pdfIn PDF document text
    • https://s3.amazonaws.com/dipafuxe/charlotte_s_web_questions_and_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/69287962772.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f863.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF863 4996 bytes
SHA-256: 5f7d3448e389535d28fceb70c58a7caf608bda9b177e29e7bf3a75a51020df86
font_01_sfnt_off00010969.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10969 10964 bytes
SHA-256: 291ed96f0ea3cf45d01210d4ff8be2f109aa73b7b8c553eb3cf394739661f7be
font_02_sfnt_off00012ee0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EE0 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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