Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bbc19ae5f9e27c…

MALICIOUS

PDF

67.7 KB Created: 2020-12-24 03:40:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 10cbedddae5395b04daa88650ee6f31d SHA-1: 04c9ee42749002e05e8bb28b6e82683c55b4cbfc SHA-256: 62bbc19ae5f9e27cfc55bcdc220bf0d713970bf45ab473eb75c6a458b3a5d4d5
176 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs, one of which, 'https://traffnew.ru/strik?utm_term=3201+horizon+drive+springfield+il', is flagged as suspicious and likely malicious. The PDF also contains a link farm heuristic, suggesting it's part of a larger SEO manipulation scheme to distribute malicious content. ClamAV detection and ML classification further support its malicious nature, likely as a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://traffnew.ru/strik?utm_term=3201+horizon+drive+springfield+il PDF link annotation
    • https://volosodavebogo.weebly.com/uploads/1/3/4/8/134873809/5958023.pdfIn PDF document text
    • https://fowalafe.weebly.com/uploads/1/3/4/7/134722097/5318614.pdfIn PDF document text
    • https://zisafidavilux.weebly.com/uploads/1/3/2/8/132814196/geseruzuwozik.pdfIn PDF document text
    • https://fanarise.weebly.com/uploads/1/3/4/3/134377412/1710646.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_5f89397773899.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463286/normal_5fd260f6182fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421640/normal_5f9e9235d7413.pdfIn PDF document text
    • https://mogidudurunupiz.weebly.com/uploads/1/3/2/6/132695636/6012473.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/pewebopufupe/fisdap_ob_study_guide_emt.pdfIn PDF document text
    • https://s3.amazonaws.com/levumoduf/17107506162.pdfIn PDF document text
    • https://s3.amazonaws.com/bugutaj/john_5_commentary_bible_hub.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_off0000c88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88F 5596 bytes
SHA-256: 504255804d4bf0be0c5cf026ecc2e2bc377442812bf6222c44caf9ff4125d9bb
font_01_sfnt_off0000dbb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBB4 11548 bytes
SHA-256: 86ed59b9cfbf237c02ba8186cebede8f72469f0537b073f4dd6071177df9ac3d

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