Malicious PDF — malware analysis report

Static analysis result for SHA-256 faa3b9e1588f5746…

MALICIOUS

PDF

80.4 KB Created: 2021-03-19 19:26:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 57f74157ae0b02bda80642985160bf93 SHA-1: 9a33605c89800142c84a7e8123b6b7b4400ce03e SHA-256: faa3b9e1588f574651fadd2180fb251d7319840e708061b9a3a68395d0746ba6
186 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm designed to redirect users to potentially harmful content. The embedded URL 'https://midufefew.ru/strik?utm_term=power+pressure+cooker+xl+whole+frozen+chicken+recipes' is a primary indicator of the phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.
  • 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://midufefew.ru/strik?utm_term=power+pressure+cooker+xl+whole+frozen+chicken+recipes PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4451368/normal_5fe7ca8783281.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/stanley_jump_starter_700_amp_review.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501770/normal_5fd982e81f7c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488339/normal_5ffa96ae57689.pdfIn PDF document text
    • http://sizuxofutitarax.mypressonline.com/sakowopevoxorawezisefi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496381/normal_5fd6ef31839c7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491398/normal_60351ab77f679.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444884/normal_602c8740e4f00.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485587/normal_6021a3474b80f.pdfIn PDF document text
    • http://nofamuxerewe.22web.org/amyotrophic_lateral_sclerosis_review.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/gogoxowiniza/lafedegufewemulaxubovum.pdfIn PDF document text
    • https://s3.amazonaws.com/dupula/aha_guidelines_2018_stroke.pdfIn PDF document text
    • https://ef90beaa-bca2-431e-862c-49c19dd94618.filesusr.com/ugd/06497e_f59e0712d4c3457cb55ed28eb9785395.pdf?index=trueIn PDF document text
    • https://e57d8632-f742-4524-ada6-9cdf759d9f13.filesusr.com/ugd/b0cb2d_f3e67cee694b42a7a8877ec4843b8385.pdf?index=trueIn PDF document text
    • http://jimibidubarabus.epizy.com/36490271807.pdfIn PDF document text
    • https://c1d61d78-9bae-425c-b347-ee91470fe4f1.filesusr.com/ugd/60933b_26d1ff6a5f8847d48bc8bd526aac1c4a.pdf?index=trueIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_c2c19c31dfb44f70a537f5ef640df739.pdf?index=trueIn 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_off0000fcbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCBD 5168 bytes
SHA-256: 784a3b9aca2bf8fc4745c97c77ec3e1ab25830c13cee86d6d759ab2fef5d4c5b
font_01_sfnt_off00010e73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E73 11068 bytes
SHA-256: cd01d70b7569cfa11aae09c71c2f2504e3734d329ed4fb5071ac053b88364af3

Open this report in the interactive analyzer, or submit your own file for analysis.