Malicious PDF — malware analysis report

Static analysis result for SHA-256 b6eb55c6bf4375b6…

MALICIOUS

PDF

89.1 KB Created: 2021-03-01 11:42:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 27bae693f7923e46a75af788d514cb36 SHA-1: b1026265ddcb152e1e15340bc5606efdb28994fd SHA-256: b6eb55c6bf4375b6d3a4cc1698ec652606a78e3cd53ca0ec332fadd14ff63547
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xajibur.ru/123?utm_term=diono+radian+3+rxt+forward+facing+installation PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4444123/normal_5fce6072b1cf3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474218/normal_5fea070b5cfe6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393791/normal_5fd6a05f45d3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451353/normal_60343616b431d.pdfIn PDF document text
    • http://euromarket.pro/buildroot_primary_siteb42g3.pdfIn PDF document text
    • http://xilenemivagola.mywebcommunity.org/how_to_watch_twilight_eclipse_for_free.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505687/normal_5fcfaf9ab7d95.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370541/normal_602ea95f3ba8f.pdfIn PDF document text
    • https://cdn.sqhk.co/tedefoso/cKjjjhg/pba_pro_bowling_game_nintendo_switch.pdfIn PDF document text
    • http://helpcenterbusiness.xyz/75235740392dc34t.pdfIn PDF document text
    • http://rixorevu.getenjoyment.net/lenipowugoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378855/normal_5fd77ece91759.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bagugexasorip.myartsonline.com/vimosofoximunugot.pdfIn PDF document text
    • http://zugepoguj.onlinewebshop.net/comcast_remote_codes_for_samsung.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_off00011fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FDB 5512 bytes
SHA-256: c02c1595bea8cdace36b151e55b4dd3d9aae23b77106e1f2e37a91bcd0bfd3d0
font_01_sfnt_off000132ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132CA 10620 bytes
SHA-256: 99bc362a31b527863aea9ff79b00d1c28f3824c3451d811544f9b372a2850b61

Open this report in the interactive analyzer, or submit your own file for analysis.