Malicious PDF — malware analysis report

Static analysis result for SHA-256 dfa7402a4dbee085…

MALICIOUS

PDF

92.0 KB Created: 2021-03-02 13:37:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: dc84622f2ca880c9fbf3133fc36668a3 SHA-1: 59c2ffa420da52c4f7247fac2730e0a37395f62c SHA-256: dfa7402a4dbee085dad02e476610bcf43c4c18438f538e4663d1f42d16439685
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, indicative of a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are consistent with techniques used to redirect users to malicious sites, potentially for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://midufefew.ru/award?keyword=how+to+train+your+dragon+2+dreamworks+wiki PDF link annotation
    • https://besugadofozoxi.weebly.com/uploads/1/3/5/3/135396803/3324962.pdfIn PDF document text
    • http://newipufisatag.scienceontheweb.net/how_to_study_for_ochem_2.pdfIn PDF document text
    • http://xofofumireke.mypressonline.com/dd_5e_unearthed_arcana_tunnel_fighter.pdfIn PDF document text
    • https://nemabofafuz.weebly.com/uploads/1/3/5/3/135389169/2687121c7c8.pdfIn PDF document text
    • https://wuwosafojopog.weebly.com/uploads/1/3/1/4/131407683/1f1fe4.pdfIn PDF document text
    • http://medebupima.sportsontheweb.net/96008875035.pdfIn PDF document text
    • https://cdn.sqhk.co/wazikunal/hh277hj/sajuwevitejanimoro.pdfIn PDF document text
    • http://rubewox.sportsontheweb.net/kung_fu_panda_2_full_movie_dailymotion.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404955/normal_5fea3039e72e4.pdfIn PDF document text
    • http://kitafoged.medianewsonline.com/25747560120.pdfIn PDF document text
    • http://nutristrike-shop.ru/747959476894ycup.pdfIn PDF document text
    • http://jolijivik.scienceontheweb.net/turtle_beach_px4_headset_manual.pdfIn PDF document text
    • http://usacreditreport.info/football_live_on_tv1iwp8.pdfIn PDF document text
    • https://ladetizor.weebly.com/uploads/1/3/4/7/134731735/xexeteralopoxaxiso.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408701/normal_60107180ca576.pdfIn PDF document text
    • http://lidzadva.xyz/7958287723mcvgd.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/gfihhjg/my_singing_monsters_wiki_epics.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tiwatimab.atwebpages.com/53063949737.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_off00012c00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C00 5464 bytes
SHA-256: d95c56ad10ab0bee9b61f0a95fd193b2c85b2e63cde70b5c5707e0ad967c7402
font_01_sfnt_off00013e9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E9A 10588 bytes
SHA-256: a171355f489cec9e9f7bd29edcf577d8cdd36fb3d8e355472d42c9aa541bd3e3

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