Malicious PDF — malware analysis report

Static analysis result for SHA-256 fae423cb0b608010…

MALICIOUS

PDF

85.5 KB Created: 2021-03-05 11:28:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-17
MD5: 03cc77b3b53d6533b75ebabbb7b6b2e0 SHA-1: 1bb28dd2cdb26dcb0ee48ccf994f207d7b16243c SHA-256: fae423cb0b60801025d6decca248698f9943429f5d0c9c1f9119da46f8ae7a84
246 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

This PDF document is identified as a credential phishing lure, impersonating a brand to trick users into clicking malicious links. The document contains a link farm with numerous external URLs, many hosted on disposable domains, designed to redirect users to phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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.
  • Brand-impersonation credential phishing lure critical SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: action link to abused redirector https://fijuxibafituwu.weebly.com/uploads/1/3/4/1/134109117/8131935.pdf.
  • 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://jumiwimov.ru/wb?keyword=alaska%20drivers%20license%20renewal%20by%20mail PDF link annotation
    • https://cdn.sqhk.co/biposuba/jlFjgdG/movuninusunemenojulafeda.pdfIn PDF document text
    • http://walolexokesufa.sportsontheweb.net/wodefobolepew.pdfIn PDF document text
    • https://fijuxibafituwu.weebly.com/uploads/1/3/4/1/134109117/8131935.pdfIn PDF document text
    • https://cdn.sqhk.co/ragojagef/JrGiehd/61135642561.pdfIn PDF document text
    • https://barezixajeg.weebly.com/uploads/1/3/4/3/134318527/darorizi.pdfIn PDF document text
    • https://pomorewosijimop.weebly.com/uploads/1/3/2/6/132681296/7bb7b2b101753a.pdfIn PDF document text
    • https://nupariredarig.weebly.com/uploads/1/3/4/3/134357859/xipagifexapo-zisot.pdfIn PDF document text
    • https://cdn.sqhk.co/xezafube/jjjiikE/champions_hockey_league_2020_wiki.pdfIn PDF document text
    • https://cdn.sqhk.co/rabataxuvax/xajcxgf/27444971534.pdfIn PDF document text
    • http://vorakumezaxof.mygamesonline.org/types_of_csr_reporting.pdfIn PDF document text
    • http://gosoxegekiri.mywebcommunity.org/54670940616.pdfIn PDF document text
    • https://cdn.sqhk.co/vukebomuwan/ji1hcd7/vitamin_d_deficiency_symptoms_include.pdfIn PDF document text
    • https://cdn.sqhk.co/kefekawit/jbxwXBm/amaze_file_manager_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/velabolo/xiezhi9/mechcom_3d_rts_mod_apk.pdfIn PDF document text
    • http://vigikigopaloze.medianewsonline.com/kenneth_copeland_healing_scripture_for_health_and_strength.pdfIn PDF document text
    • https://cdn.sqhk.co/nozelenid/jVPIgeg/splash_lagoon_covid.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8fc1c2d6-49ba-4d63-8b95-0327ef2b1627.filesusr.com/ugd/1849a1_3e5e9066f8df4ea299a6911797c81205.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jepavilutabilel/40347621888.pdfIn PDF document text
    • https://s3.amazonaws.com/fenatagazise/pipali.pdfIn PDF document text
    • https://s3.amazonaws.com/vibuvomomuv/ailesa_album_video_song_isaimini.pdfIn PDF document text
    • https://f3c4034a-4a94-4c47-b6c5-0445626d7bf8.filesusr.com/ugd/655f09_301e588b8aa149c5b860795c2a8dc430.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_off00010f01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F01 5532 bytes
SHA-256: 4163334ce2da0b7f8e1e7f9aebf1d9199429345716f2d16438ec884e059e16c9
font_01_sfnt_off000121d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121D5 11296 bytes
SHA-256: 4deb75f9e1c541ff4fc788f24e9437065dca6151e8b1c08fe3fe52ddf3af37de