Malicious PDF — malware analysis report

Static analysis result for SHA-256 441d237a16aa793b…

MALICIOUS

PDF

96.9 KB Created: 2021-06-10 18:48:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: fa47506a2967e93b66cb8f3d3794d309 SHA-1: 5273f2cc7deb377b1e727a9646559bc3e2d6155b SHA-256: 441d237a16aa793ba9c1e304c045cc72751e84947c4d1b31b7e90c90c2f09def
186 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many hosted on disposable domains, suggesting it is part of a link farm designed to manipulate search engine results or redirect users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or scamming purposes. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9950

Heuristics 6

  • 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.
  • 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://infrive.ru/pbw?utm_term=wow+classic+leveling+as+holy+paladin PDF link annotation
    • https://jedunifoxawixe.weebly.com/uploads/1/3/4/4/134458330/e8acd5874.pdfIn PDF document text
    • https://kikuwigew.weebly.com/uploads/1/3/1/4/131407235/dab65e148e18.pdfIn PDF document text
    • https://repitosa.weebly.com/uploads/1/3/2/6/132681506/dolizetamezuxo_pivumiginex_tosonop_wirelozivogiba.pdfIn PDF document text
    • https://vozoduxi.weebly.com/uploads/1/3/2/8/132815828/bipupukotodow.pdfIn PDF document text
    • https://tugupititu.weebly.com/uploads/1/3/4/8/134887320/1368714.pdfIn PDF document text
    • https://xazulifego.weebly.com/uploads/1/3/4/7/134727283/wafururineguxob-remuju-guwawivi.pdfIn PDF document text
    • https://devegiwosoti.weebly.com/uploads/1/3/4/5/134592662/goxafix.pdfIn PDF document text
    • https://wuzusujozibavil.weebly.com/uploads/1/3/4/6/134689519/87e9b2.pdfIn PDF document text
    • https://zekisotirateme.weebly.com/uploads/1/3/4/3/134368555/3500979.pdfIn PDF document text
    • https://tumizoma.weebly.com/uploads/1/3/2/8/132814974/1576557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://najajadux.pbworks.com/w/file/fetch/144718524/xagotus.pdfIn PDF document text
    • http://kefimazusob.pbworks.com/w/file/fetch/144424770/tisilebukinovizukizun.pdfIn PDF document text
    • http://zixememot.pbworks.com/f/54411464240.pdfIn PDF document text
    • http://mukibilevejo.pbworks.com/w/file/fetch/144468642/is_downloading_cracked_games_illegal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd15cb07-be33-4d84-82ba-d818456c8185/95694069521.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144494202/lakegifubek.pdfIn PDF document text
    • http://lasevixo.pbworks.com/f/gunship_battle_helicopter_3d_mod_apk_unlimited_money.pdfIn PDF document text
    • http://fosodijo.pbworks.com/f/what_is_comparative_international_human_resource_management.pdfIn PDF document text
    • http://fatakalewene.pbworks.com/f/jazadutaxisefisixixa.pdfIn PDF document text
    • http://pinurakus.pbworks.com/f/lopubi.pdfIn PDF document text
    • http://tujelupirobe.pbworks.com/w/file/fetch/144614331/goat_simulator_payday_free_download_android.pdfIn PDF document text
    • http://pibadaro.pbworks.com/w/file/fetch/144582327/zijogoravat.pdfIn PDF document text
    • http://xegosigex.pbworks.com/f/29461834233.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca78eb88-cf1f-4c6f-a066-dcbda5280e6e/vadirifibolekojotuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/929697b2-48de-4932-aa66-6db83142649c/88784542809.pdfIn PDF document text
    • http://fadoposapat.pbworks.com/w/file/fetch/144445113/12754240129.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000128e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128E9 5216 bytes
SHA-256: 512d8bae77bb8dd748ce9602c5bd493e60ea1535dbe430b008363dda76bcbb7c
font_01_sfnt_off00013aaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13AAF 13656 bytes
SHA-256: 15bd64a763278c4ad88853f57127783fda1c644caa1f813c2285c434fa4c2222
font_02_sfnt_off000165fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x165FD 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361