Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d1cc9680e73bddb…

MALICIOUS

PDF

115.2 KB Created: 2021-03-24 13:39:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 91b77ee582a01695df576c59084654c0 SHA-1: 1271a6268d293305b9d634d207d025afe1723546 SHA-256: 5d1cc9680e73bddb652f046fdb57a2567c9e0297de2a607981107df51a999170
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 7

  • 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 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.
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ponafet.ru/wix?keyword=elementary+facts+worksheet+answers PDF link annotation
    • https://pivazadigemeza.weebly.com/uploads/1/3/4/6/134642233/dezadabusin-mojivuxakijik-wafuzevax-sefuvala.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365576/normal_600cc7605613b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4421042/normal_5feb7b4d0b7be.pdfIn PDF document text
    • http://titodisoke.22web.org/juxipaluzowowisone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470016/normal_6007a34ae1e60.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372982/normal_602b3753866e8.pdfIn PDF document text
    • https://cdn.sqhk.co/wepunajexiju/aMbrf9R/download_game_true_surf_mod.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5fd7df8656c35.pdfIn PDF document text
    • https://garizoruzaxa.weebly.com/uploads/1/3/3/9/133986237/rogodevipawuzos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486550/normal_6025c06ebd986.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479705/normal_6006266716f3a.pdfIn PDF document text
    • https://cdn.sqhk.co/fedovipawe/l7ngjce/learn_html5_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vinasujitupe/ihjHibX/stick_stunt_biker_2.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/besafefaf/sewogu.pdfIn PDF document text
    • https://s3.amazonaws.com/bulikowexunepov/kagisawogumerilonatoxad.pdfIn PDF document text
    • http://webeputexewek.rf.gd/kaxulunurawedas.pdfIn PDF document text
    • http://kepujelibip.epizy.com/sub_indo_amazing_saturday_ep_21.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/the_republic_plato_quote.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_off00018626.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18626 5336 bytes
SHA-256: d04d54700b7ec5d34380725fa272a3d47d3b129130611b5c1c799bfdfb7ecf55
font_01_sfnt_off0001983b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1983B 11620 bytes
SHA-256: 720fbf0de0f37270aee797b8165e6dff16c17cde82bb7e9f73a8319f81fbb333

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