Malicious PDF — malware analysis report

Static analysis result for SHA-256 9076bcfca096ff3a…

MALICIOUS

PDF

77.5 KB Created: 2021-02-23 08:19:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 4a78315c9c31eef64d9e542339d9e8fc SHA-1: 748a0d73555d4db18a3c001778b756d8e3e543c2 SHA-256: 9076bcfca096ff3a41c0ce5446a5e3475f3be35f628554ce545df57236b3a1c9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, with one pointing to 'maypoin.ru', suggesting a phishing or malware distribution attempt. The presence of heuristics like 'PDF_SEO_LINK_FARM' and 'SE_PASSWORD_ARCHIVE_LURE' indicates a sophisticated attempt to disguise malicious content and trick users into downloading it. The ML classifier strongly flagged this PDF as malicious, aligning with the ClamAV detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/wix?keyword=avg+pc+tuneup+2018+product+key+download PDF link annotation
    • https://rikekipodoze.weebly.com/uploads/1/3/0/7/130776447/3ccd7e7f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381090/normal_601b048f6d533.pdfIn PDF document text
    • https://cdn.sqhk.co/wusakituzu/javdD2N/8864875096.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401723/normal_5fc592dd1e54b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481273/normal_60002543058fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479715/normal_600d1b9f76872.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387703/normal_5fc75c1b41a53.pdfIn PDF document text
    • https://cdn.sqhk.co/vudararemane/3ijjifY/download_video_maker_movie_editor_for_android.pdfIn PDF document text
    • https://guxuxexor.weebly.com/uploads/1/3/0/7/130775085/tenewotunujudet_nanipo_rutodarawo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500187/normal_5fdc328610d80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_5fe14205506ed.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4495849/normal_5fced0dcf423c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389106/normal_601591d56c84c.pdfIn PDF document text
    • https://cdn.sqhk.co/kitijorawul/emlUSgh/racing_surf_ski_for_sale_gold_coast.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/mikibetiv/bafusitunidabede.pdfIn PDF document text
    • https://s3.amazonaws.com/xokebore/sql_server_binary_checksum_performance.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/math_proofs_textbook_answers_grade_11.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_off0000d94c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD94C 5724 bytes
SHA-256: c0e1e0cb6f51980addffae40accb76df4c064c0ac6d457074f69d9acfa14940d
font_01_sfnt_off0000ecfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFD 16392 bytes
SHA-256: f08ae036393d321385dbf059c9c88508af3a938167bb41d315c3e39ab3fb0e73
font_02_sfnt_off00011add.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ADD 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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