Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc4a9b2faafa636e…

MALICIOUS

PDF

74.3 KB Created: 2021-02-13 12:57:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-13
MD5: ed0ed997af42cb7abaf35439c3f3414e SHA-1: e3d5385cb45e61f21949d0ad5304c36bfde5c0f7 SHA-256: fc4a9b2faafa636e1fe03e4783306501ae42c956c8e90d7768728202979a1740
134 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs pointing to disposable domains, a common tactic for hosting malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

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 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.
  • 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://baarspo.ru/wix?keyword=radio+shack+wx200+weather+station+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4478685/normal_600aa59aeaa9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470836/normal_600d2ce5e128a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468270/normal_5ff5c6f268455.pdfIn PDF document text
    • http://malespw.xyz/646414458092a7ib.pdfIn PDF document text
    • http://masterpowerpoint.com/noriwabirifokamejatazuwezwsftg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4467300/normal_6011ed992efde.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426422/normal_5ff1ca2515eb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368235/normal_5fed717f3c604.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fofeparulofiz.rf.gd/36945234151.pdfIn PDF document text
    • http://sijopar.epizy.com/nepetoperokugoga.pdfIn PDF document text
    • https://s3.amazonaws.com/wizakokowe/jaruxugamujulixoxaxasom.pdfIn PDF document text
    • http://ralivapoked.epizy.com/free_capitalization_and_punctuation_worksheets_4th_grade.pdfIn PDF document text
    • http://nadakenumugev.rf.gd/antivirus_avira_terbaru_untuk_pc.pdfIn PDF document text
    • http://pidukuniwid.epizy.com/45931117908.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/biometric_fingerprint_reader_driver.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_off0000e4f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F7 5684 bytes
SHA-256: f4bce699f30d13caf7856a15d72ddba89efeeabcbaf519a018f750775c7bc531
font_01_sfnt_off0000f839.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF839 10476 bytes
SHA-256: 85e2675af51f46761d27a345c0b78eb5400378b06fef1e3dec5b8b4b60945bae

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