Malicious PDF — malware analysis report

Static analysis result for SHA-256 03169d11de1854f6…

MALICIOUS

PDF

69.7 KB Created: 2021-02-23 21:35:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 8073ee8ff5ab8f07e8847c345b955334 SHA-1: e19e5488dfde06d7385e765762f936f2574a7416 SHA-256: 03169d11de1854f603d868ae8f2ed50945061bcb3bc23600fbe3cabec58b27a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, identified as a link farm, suggesting an attempt to manipulate search engine results or direct users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards a campaign leveraging external resources for malicious purposes.

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 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://bologen.ru/strik?utm_term=stihl+electric+weed+eater+accessories PDF link annotation
    • https://mibarepazakeme.weebly.com/uploads/1/3/4/6/134685426/4627384.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378155/normal_5ff166f679bbc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365634/normal_6009ea3e2d6ab.pdfIn PDF document text
    • https://lopufofogepuxal.weebly.com/uploads/1/3/4/6/134695200/130803.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489839/normal_6024182621929.pdfIn PDF document text
    • https://momukilogavar.weebly.com/uploads/1/3/1/4/131437465/9415782.pdfIn PDF document text
    • https://farumurul.weebly.com/uploads/1/3/5/3/135326432/bopajiwomaz-dumububexoxiga-musiwigaruvufo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452193/normal_5fe98d4d06eeb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446645/normal_600249cde7b54.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456671/normal_60282d52de3d9.pdfIn PDF document text
    • https://jeluxipofike.weebly.com/uploads/1/3/4/4/134490416/biripoxuzap-wokamudax-buripira.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422890/normal_5ff71b54bba84.pdfIn PDF document text
    • https://vesanalu.weebly.com/uploads/1/3/1/4/131482823/50107.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486758/normal_5fcc4efd96081.pdfIn PDF document text
    • https://fusasevamasaxig.weebly.com/uploads/1/3/4/8/134866100/zaforejujexojav.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/bejexe/tugaxafuxagoluwusifefizin.pdfIn PDF document text
    • https://s3.amazonaws.com/suzujewa/23757853471.pdfIn PDF document text
    • https://s3.amazonaws.com/doxifuba/tower_defense_king_hack_mod_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/lightroom_presets_mobile_dng.pdfIn PDF document text
    • https://s3.amazonaws.com/jolunenafobuw/39797182668.pdfIn PDF document text
    • https://s3.amazonaws.com/xurixado/melegulukazukidas.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/cannot_twitter_from_app_store.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_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 5224 bytes
SHA-256: 348e4f49f07b033bcee582e0175ee577d77a28c0e978c213f357df42a046a331
font_01_sfnt_off0000e660.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE660 10120 bytes
SHA-256: d23c9f19fc3e8a47c7942014ab8ab4e1d6accfd6c615350a48578e379759e506

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