Malicious PDF — malware analysis report

Static analysis result for SHA-256 04e49e34cb83d550…

MALICIOUS

PDF

76.3 KB Created: 2021-02-20 01:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 1723f67c10abe198178b0eed753181af SHA-1: 2301b3a62404e1b9bb3554cf7329882202f96f28 SHA-256: 04e49e34cb83d550c1d408164bb1a9eb9e5193cdff846f94a6e62afcf70af90e
186 Risk Score

Malware Insights

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

The PDF contains a large number of external links pointing to various domains, many of which appear to be disposable or used for SEO manipulation. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or distributing further malicious content. While no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://jacksth.ru/123?utm_term=george+vs+george PDF link annotation
    • https://cdn.sqhk.co/xuvisisitinu/djchgHb/obstacles_syd_matters_bass_tabs.pdfIn PDF document text
    • http://sarhello.online/17926437686w0l1s.pdfIn PDF document text
    • http://recepty-dd.info/libro_pepe_y_teo4q0dd.pdfIn PDF document text
    • https://vanimiravupu.weebly.com/uploads/1/3/2/7/132710567/5951617.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/newanataroved-wobodo.pdfIn PDF document text
    • https://wuzinetasinozud.weebly.com/uploads/1/3/1/6/131606123/2493581.pdfIn PDF document text
    • https://fenazimo.weebly.com/uploads/1/3/4/4/134437137/tudunalebevu-fagop-raruriweti-kibupowopaw.pdfIn PDF document text
    • https://lekomitigukajar.weebly.com/uploads/1/3/5/3/135345412/a3e178671a.pdfIn PDF document text
    • https://kowuzuworos.weebly.com/uploads/1/3/2/6/132682574/8ff3efa3ba9.pdfIn PDF document text
    • https://cdn.sqhk.co/xusawikorut/JDmicPZ/vijatarigufuxowafulosato.pdfIn PDF document text
    • http://businessoutsourcing.org/jilolifiramaneponalewevel8t81.pdfIn PDF document text
    • https://cdn.sqhk.co/muzubasiwu/mIhih3T/copart_salvage_auto_auctions_phoenix_az.pdfIn PDF document text
    • http://koolmaxt.online/volar_sobre_el_pantano_librohlyu5.pdfIn PDF document text
    • http://debodopox.iblogger.org/10999819980.pdfIn PDF document text
    • https://zumizosapozogem.weebly.com/uploads/1/3/2/6/132681504/82926d.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/wizedumi/airpods_2_android_low_volume.pdfIn PDF document text
    • http://witigegewujal.rf.gd/what_does_caught_his_eye_mean_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/tirimofufemukat/printable_schedule_template_daily.pdfIn PDF document text
    • https://s3.amazonaws.com/tajimipojimo/difete.pdfIn PDF document text
    • http://vopapatadape.epizy.com/veravusuxusonup.pdfIn PDF document text
    • https://s3.amazonaws.com/xazarujokemus/bifatuxawob.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eed9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEED9 4704 bytes
SHA-256: f24793897f9ed2797888466ddac428bb82edf6988a725d0a151064edffedf5e0
font_01_sfnt_off0000fefa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEFA 11008 bytes
SHA-256: 3b8ec7bc77bbbf9533def9794e80cf9fce5ba430ac5ccc00fd061a6db05c5e27

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