Malicious PDF — malware analysis report

Static analysis result for SHA-256 6d196263655a4835…

MALICIOUS

PDF

97.3 KB Created: 2021-03-21 10:31:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5c312632686675743cc7446ac0d150e3 SHA-1: eb1a7469dc5aac66d57f2323bc596cf659a6a737 SHA-256: 6d196263655a4835b928cfa043f551b25e8330473654016bd53860e696d78083
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting and are part of a link farm, suggesting a phishing or malware distribution scheme. The document body, though partially corrupted, contains keywords like 'Gratuitous space battles guide' and metadata indicating it was generated by wkhtmltopdf, which can be used to create malicious PDFs.

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://pelibifir.ru/wix?keyword=gratuitous+space+battles+guide PDF link annotation
    • https://cdn.sqhk.co/fukofuwuvis/hfhhhdb/buy_owners_manuals_online.pdfIn PDF document text
    • http://nutristrike-shop.ru/pedagogy_of_freedom_citationylz9p.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387920/normal_602289388ba29.pdfIn PDF document text
    • https://cdn.sqhk.co/mozoposowi/gidBdhg/lullaby_music_for_babies_in_the_womb.pdfIn PDF document text
    • https://cdn.sqhk.co/rizijuwet/3eiegen/letikunepaxepuxurudijibu.pdfIn PDF document text
    • https://cdn.sqhk.co/talokelom/jgVXhhD/blistex_rollerball_lip_balm.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481285/normal_5ffac095a8335.pdfIn PDF document text
    • https://cdn.sqhk.co/samekikogeri/gdiivhb/37551410441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465262/normal_6000c9476a951.pdfIn PDF document text
    • http://covid-19online.site/62942451667mwg87.pdfIn PDF document text
    • http://cosmicgig.com/xedixuganupepesalezetag5yi9f.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/henD6if/85297255182.pdfIn PDF document text
    • http://sijiwepi.mypressonline.com/movobi.pdfIn PDF document text
    • https://cdn.sqhk.co/zeliravepuj/0blnPgg/baratukekonapob.pdfIn PDF document text
    • http://idealica-ituficiale.website/zekogajekewucoctc.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/ggghm4m/parent_portal_powerschool_login_wsfcs.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0c78b26-6863-4fe8-a125-3cd3431c31e1/29754809769.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56af6ea-a25f-44ae-b668-668869bc0f7e/wavepufavixokegonen.pdfIn PDF document text
    • http://nakeviw.myartsonline.com/sisiputowejawadeno.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/pogutiwukolisukasebifased.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_off00013c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C0F 5412 bytes
SHA-256: d1a15446dee45d72edc03b2972f49290d022f9aa36e5780ccb30b248606b3f51
font_01_sfnt_off00014e7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E7B 11720 bytes
SHA-256: 02d3ed720af1d0416ed3218a052779ae21bc595fc513704ac1b9578fefa883d5

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