Malicious PDF — malware analysis report

Static analysis result for SHA-256 22dd977279eabba1…

MALICIOUS

PDF

88.1 KB Created: 2021-03-03 18:18:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 67618715ec87e0e5c734fec7b821c2b5 SHA-1: 9efcb49a1ebbd6ec586933876b9231fc0f314625 SHA-256: 22dd977279eabba12481cce2421fc80cd8ee6e160d0f4c44dfc70385abccc440
126 Risk Score

Malware Insights

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

The PDF file contains multiple links to external websites, with one specifically targeting a search query related to art design. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or scam attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://pelibifir.ru/award?keyword=7+elements+of+design+in+art PDF link annotation
    • https://mefirotevi.weebly.com/uploads/1/3/5/3/135314773/sirizov_xiwike.pdfIn PDF document text
    • https://xisuviwilizej.weebly.com/uploads/1/3/4/3/134320176/8025393.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403954/normal_5fd77b6f342d7.pdfIn PDF document text
    • https://vekatofe.weebly.com/uploads/1/3/0/7/130775682/10acd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4383138/normal_5fff44e7c113e.pdfIn PDF document text
    • https://kadezejuvi.weebly.com/uploads/1/3/4/6/134603763/08a5e52d883.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445879/normal_5fd1ee2b17f6a.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/hia4jc5/dead_paradise_3_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449602/normal_5ff6af2a52b93.pdfIn PDF document text
    • http://juzufezike.mygamesonline.org/dead_wake_summary_by_chapter.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454668/normal_6030498708524.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/jenisozazewubo/polar_fleece_bed_sheets_uk.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/hink_pink_examples_and_answers.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_off00011157.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11157 5000 bytes
SHA-256: 375c1dadcfe015c4f437ca3bbb7768f9623d03f6d24246a995a3f552512c3dfd
font_01_sfnt_off0001223c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223C 10240 bytes
SHA-256: b23b1cdd6baf61dab818b9b8746aba4971201913e5161f637e78a97b3152158a
font_02_sfnt_off0001454c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1454C 4324 bytes
SHA-256: 05d2457133b820fa77aa358e30e9acfbad3f04c46ced9a37296d9311117db176

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