Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbe03fbccd0072d7…

MALICIOUS

PDF

76.3 KB Created: 2021-04-29 13:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 0d1e7b57a248bc800a41eb126b6f0ea7 SHA-1: 15937be9e6039f88e589209e103b79ca0f1e36c7 SHA-256: cbe03fbccd0072d7ab82a77a8f3ca56c909ace6c556da5107a2863c64d202670
166 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 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://fokemale.ru/strik?utm_term=lg+front+loading+washer+drain+pump PDF link annotation
    • http://hq-cleartv.info/koziwepuvopexabizormcmh.pdfIn PDF document text
    • http://istlan.space/gezebekofawuluduxedutuubdde.pdfIn PDF document text
    • https://cdn.sqhk.co/dujujema/idjajeC/kalixufejosexodopekoj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_60170a9625386.pdfIn PDF document text
    • http://douchehq.xyz/9611815293110mzy.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4492880/normal_600faa68a6fc4.pdfIn PDF document text
    • http://esagafow.fun/tedemorotigojejijiguanauw.pdfIn PDF document text
    • https://cdn.sqhk.co/tosilura/cibpsge/8986636295.pdfIn PDF document text
    • https://pabarasoziraw.weebly.com/uploads/1/3/5/3/135324669/1752204.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4456166/normal_5fc69558b13dc.pdfIn PDF document text
    • https://cdn.sqhk.co/kusamika/a0jiZ6b/xukoloxibovegedub.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4482863/normal_5fc78ccdc92e3.pdfIn PDF document text
    • http://ig-supportcenter.xyz/fingerstyle_guitar_music_sheet_freekj3qy.pdfIn PDF document text
    • https://gerugufudob.weebly.com/uploads/1/3/4/8/134869234/mikubafix_zutonifenufanex_dajex_somumewuterimib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496597/normal_604cdb54296fe.pdfIn PDF document text
    • https://cdn.sqhk.co/ruxuvedije/gckjb28/brasfoot_2019_full_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nijudow/lonely_planet_guide_berlin.pdfIn PDF document text
    • https://s3.amazonaws.com/degagaziv/wamujalezatewuvu.pdfIn PDF document text
    • https://s3.amazonaws.com/regufojalojaza/41021186028.pdfIn PDF document text
    • https://s3.amazonaws.com/taturi/51634416953.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/14136365906.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB07 5488 bytes
SHA-256: 451feff00159227eaa0c8acc4c690eb6edd0bd7ff0c17a22d5e388c9ec62ed24
font_01_sfnt_off0000fda7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA7 11284 bytes
SHA-256: 89ec9b41f4a286a6281cd4b4bf1bd69a29ec3434d5d757551c1b8dd677762ec9

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