Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc62ce7d91c570c9…

MALICIOUS

PDF

72.1 KB Created: 2021-03-02 17:34:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: e2e8ddb0d26026ae6c79a9e3abda39b2 SHA-1: 358336b2f17b63b45cbd773b7174b26603e807ee SHA-256: fc62ce7d91c570c90ebed556b98b8ae74b46701fdc7c7b9d89a1d4d655ab4df6
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including ClamAV and an ML classifier, indicating it is likely a phishing or malware distribution document. The presence of a large number of external links, including a PDF link farm, suggests an attempt to redirect users to potentially harmful websites. While no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a malicious intent to lead users to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baarspo.ru/award?keyword=is+the+dash+diet+good+for+high+blood+pressure PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4391001/normal_6005047d9a1ab.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446162/normal_5ffdaa1a528a1.pdfIn PDF document text
    • https://sivaxawisebirim.weebly.com/uploads/1/3/1/4/131407763/lalonos.pdfIn PDF document text
    • https://cdn.sqhk.co/kolusugego/UcjfEwm/64510404845.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465537/normal_6039cf75d3f0d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374978/normal_5fcd0bf406ec5.pdfIn PDF document text
    • http://momijuluxesapek.iblogger.org/jumbled_sentences_for_class_6_with_answers.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467915/normal_5fc7e92d9f076.pdfIn PDF document text
    • http://sidawiw.iblogger.org/all_my_sons_arthur_miller_movie.pdfIn PDF document text
    • https://volufijipezuji.weebly.com/uploads/1/3/4/7/134703795/bigamesoxinotalodal.pdfIn PDF document text
    • https://cdn.sqhk.co/muligumixe/ij6ifTJ/sofafa.pdfIn PDF document text
    • https://dujeranisijoku.weebly.com/uploads/1/3/0/7/130776063/2043026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4494435/normal_60302f31afe72.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xojakawarola.rf.gd/leptosporangiate_ferns.pdfIn PDF document text
    • http://pajogapusifured.rf.gd/heatstore_intelirad_data_sheet.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_off0000dd34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD34 5380 bytes
SHA-256: 506fa24f0b533155a8e6a774f6dba13a28b06cc07e61c472963896c68d11c54a
font_01_sfnt_off0000ef75.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF75 10384 bytes
SHA-256: a8f9a73a0458bab0bd463e0f0a3a32b9443068ab35dfbe687b1df27b901e150b

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