Malicious PDF — malware analysis report

Static analysis result for SHA-256 beab90fecc81f466…

MALICIOUS

PDF

71.1 KB Created: 2021-03-25 11:38:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd7e6df75225f9b221b90c83f6296a87 SHA-1: a38b676e5b35e0e0a310e22c7f40b7f2f56940fc SHA-256: beab90fecc81f466219e467a486a4c3942774c5b908e841dfa7261f565e8b53f
156 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing lure. The ML classifier and ClamAV also flagged this file as malicious, with ClamAV specifically identifying it as Pdf.Phishing.Trojan. No scripts were extracted, but the presence of numerous external URLs indicates an attempt to redirect the user to potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nipisod.ru/aws?utm_term=sharepoint+2013+workflow+get+user+profile
    • https://mopotiwifatuge.weebly.com/uploads/1/3/0/8/130813373/jemowa.pdf
    • https://cdn.sqhk.co/nonuripot/lgiggif/powemaxa.pdf
    • http://blockingscenery.com/regagalef4z2io.pdf
    • https://cdn.sqhk.co/mopomotop/jhiiiaV/ninufigovekobipij.pdf
    • http://spainwow.pro/honda_fit_2007_for_sale_in_sri_lanka3nmwy.pdf
    • https://cdn.sqhk.co/wajuletixex/hcie77N/53404555996.pdf
    • https://joletumutete.weebly.com/uploads/1/3/4/8/134871701/kokijemisi-vinitugodigo-bevamasala-xotuk.pdf
    • https://static.s123-cdn-static.com/uploads/4375086/normal_5fcf7fda12820.pdf
    • http://dnepr24.info/xagiwexijawagikepavouz68.pdf
    • https://cdn.sqhk.co/vakolitakap/jNkhhji/1851399024.pdf
    • https://cdn-cms.f-static.net/uploads/4477921/normal_6009d55cec004.pdf
    • https://cdn-cms.f-static.net/uploads/4377388/normal_60415e36a9f58.pdf
    • https://cdn-cms.f-static.net/uploads/4449399/normal_60301547116cf.pdf
    • https://barurusijibipek.weebly.com/uploads/1/3/0/7/130740419/roxelodamil.pdf
    • http://huseyincanx.com/okimat_2_bedsgl8d.pdf
    • http://thrivewebs.com/where_do_mutt_dogs_originate_from7v4ww.pdf
    • https://cdn-cms.f-static.net/uploads/4468267/normal_600c1a87daf89.pdf
    • https://cdn.sqhk.co/molodomo/h0skTid/pofaporojefebomuka.pdf
    • https://jaluwaxigesife.weebly.com/uploads/1/3/4/6/134640648/sipototeguzum_mimatipe_mufemivobexumim.pdf
    • https://static.s123-cdn-static.com/uploads/4389792/normal_5febf01276501.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://a84030a7-2e48-4039-807a-383e2b7216cc.filesusr.com/ugd/c5d40f_77be9b547801473b90f73bb8d290fc98.pdf?index=true
    • https://aefb6378-f3ca-470a-b9d2-22936542d087.filesusr.com/ugd/fe129c_23f7ad72633a420b8f1612a115701d30.pdf?index=true
    • https://6e229dea-1f83-4be8-8cd3-388eabd4f5e3.filesusr.com/ugd/1cfe37_a651c36eec55436dadd0492633d73176.pdf?index=true
    • https://f421159b-d329-41e8-bc42-072bc93e4c50.filesusr.com/ugd/65d6f7_f94fb6db97ea42b5a0a6855892261bb2.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_off0000d7c3.bin
eecfd7c99c6a1a503de488c4b270400a3c1d7c55ce56a66aa2030834eab9244a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C3 5912 bytes
font_01_sfnt_off0000ebf7.bin
95f17c3246ea29cb4f541b5e2c0d82d1af072a9b49997997d9aa11d9069180f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 10208 bytes

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