Malicious PDF — malware analysis report

Static analysis result for SHA-256 ba22a4e119dc7e6e…

MALICIOUS

PDF

139.4 KB Created: 2021-03-28 20:25:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 33177a8fa56269b17c9250c3b39e2c5a SHA-1: ee72c61eb135a307420baca2c2568a536c49400d SHA-256: ba22a4e119dc7e6ec2ba0d647ffda784a5f70d69223ec956f42936cb06c552c6
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified by the PDF_SEO_LINK_FARM heuristic, directing users to various websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs suggest an attempt to redirect users to potentially malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://lozipotod.ru/award?keyword=ccs+medical+attendance+rules+pdf
    • https://dibotora.weebly.com/uploads/1/3/4/8/134870334/vazoxezi.pdf
    • https://static.s123-cdn-static.com/uploads/4446930/normal_5ff55c9b299df.pdf
    • https://rupuxiziwaxez.weebly.com/uploads/1/3/4/7/134765543/1720399.pdf
    • https://cdn.sqhk.co/devurekon/MnmjaKj/firestick_tv_guide.pdf
    • https://static.s123-cdn-static.com/uploads/4404528/normal_5ff905d62d9dd.pdf
    • https://rifivubego.weebly.com/uploads/1/3/1/4/131407021/kozosi-kopor.pdf
    • http://gowanenutik.mypressonline.com/91966414008.pdf
    • https://cdn.sqhk.co/buwaxaxodi/ghijgOT/82734952009.pdf
    • https://mosezogojufotu.weebly.com/uploads/1/3/0/8/130813841/bodujolazubeziwel.pdf
    • http://rumepado.mypressonline.com/augmenter_sa_concentration.pdf
    • https://cdn.sqhk.co/puxolika/fiauDo8/50425463104.pdf
    • https://bedujutetedaj.weebly.com/uploads/1/3/0/8/130874043/fosumidotevuzi.pdf
    • https://cdn.sqhk.co/zegareguw/figgigC/burusipotevonozamon.pdf
    • http://virujurarajilef.getenjoyment.net/10th_class_maths_formulas_free_download_ssc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://bavufupuvamopaf.atwebpages.com/alanea_alder_my_solace.pdf
    • http://kugajevekafino.myartsonline.com/nenewulesazaj.pdf
    • https://dc383e6d-b7a3-4e67-a88a-227fa542b6c3.filesusr.com/ugd/72b0e7_7a03b1a7ba3646f19910fcbc0a666bbf.pdf?index=true
    • https://0298dc5a-7924-4276-8279-06452a5288da.filesusr.com/ugd/b30cf0_bd4e213f2378421992bbe0844b2f230c.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001e8a3.bin
d5f75382fa8f13dd005b0c91f73565cf45f28d348d5804098e5ba4205d090f77		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E8A3 5208 bytes
font_01_sfnt_off0001fa39.bin
7ebe1484c915adbce3d9783379f8700537df6b6e127e5d991f1e3f454c1559e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1FA39 11040 bytes

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