Malicious PDF — malware analysis report

Static analysis result for SHA-256 208172ebe11155fc…

MALICIOUS

PDF

76.3 KB Created: 2021-03-05 04:36:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 48f60b912f60d7cf845e255ee793352c SHA-1: 4be69813f73541808f369c172682e99505adc581 SHA-256: 208172ebe11155fc5de07439c73397178c51399230d72a76ce55ec2cc691e1b9
186 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing further malware or leading users to phishing sites. Although no scripts were directly extracted, the PDF structure and numerous external URIs are indicative of a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://resalured.ru/strik?utm_term=taco+bell+creamy+chipotle+sauce+nutrition PDF link annotation
    • https://cdn.sqhk.co/furugilenu/Cjcje4G/wirajonaxanuxabesu.pdfIn PDF document text
    • https://nijasofefovo.weebly.com/uploads/1/3/4/7/134719995/fatetotigutepamexo.pdfIn PDF document text
    • http://cmb-accueil.com/life_beginner_teacher_s_bookkfeo4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471106/normal_5fda7a51393eb.pdfIn PDF document text
    • http://zoputezigup.iblogger.org/57290419916.pdfIn PDF document text
    • https://noselarinagebep.weebly.com/uploads/1/3/6/0/136051947/2247486.pdfIn PDF document text
    • https://cdn.sqhk.co/kewukapugino/itzDjd8/dabovixamokit.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426270/normal_603b5bde318f8.pdfIn PDF document text
    • https://zadisoro.weebly.com/uploads/1/3/4/5/134525292/bimumo-wawas-jivujol-sikusivud.pdfIn PDF document text
    • https://zalogarigi.weebly.com/uploads/1/3/2/6/132695681/1785653.pdfIn PDF document text
    • http://dubejug.iblogger.org/tupotalimusebal.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418987/normal_5fd5fa98ba04c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4470533/normal_5fcd15c80ee05.pdfIn PDF document text
    • https://cdn.sqhk.co/buwuvibija/dE3wjqS/zipawudexewa.pdfIn PDF document text
    • https://cdn.sqhk.co/sunomedude/g1gcEih/battleground_s_survivor_battle_royale_mod_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/8hgL9jb/texas_parks_and_wildlife_magazine_april_2020.pdfIn PDF document text
    • http://top-odejda.com/who_owns_the_news_organizationspq43z.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a32e93c2-1aa3-4149-af29-aa5d163ab988.filesusr.com/ugd/40336e_37e18c36b1d9455c8d739f06d4a98399.pdf?index=trueIn PDF document text
    • http://lovafis.rf.gd/74708007902.pdfIn PDF document text
    • http://tasefabomodewiv.epizy.com/menagerie_weapons_sheet.pdfIn PDF document text
    • https://98771922-91e4-4673-aa0d-7794f4435593.filesusr.com/ugd/b6aaa0_c3ea20c401d64c6b9dd842d4b5d41f44.pdf?index=trueIn PDF document text
    • https://98e80eac-0673-4bf9-a3de-4132461903b3.filesusr.com/ugd/1acd69_e8362e20f03f42c7bd421622146978ca.pdf?index=trueIn 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_off0000ebe7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBE7 5364 bytes
SHA-256: 4de776484c626c71bfec7e3a5d672a4a78202b14901078e0ddea22cb3e08557c
font_01_sfnt_off0000fdfc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDFC 11128 bytes
SHA-256: b546feec608cc9c644a7592249d4838ca8fd335a10dde5eed551f1d90c037a7b