Malicious PDF — malware analysis report

Static analysis result for SHA-256 5be00c3fcd0fde5f…

MALICIOUS

PDF

70.3 KB Created: 2021-03-25 22:58:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 6a2ed7e2f0ceeff0c1e02134d57def06 SHA-1: 1445388f284f784fb463ee2b046c575f0325c73d SHA-256: 5be00c3fcd0fde5faa8c772f72b73418b467a1a7b0ecbcdafa0c681bf05a65dd
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for SEO manipulation or directing users to malicious sites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs and the PDF structure suggest an attempt to generate traffic or lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://pelibifir.ru/award?keyword=possessivartikel+a1+pdf PDF link annotation
    • https://cdn.sqhk.co/fezajuwu/cgdjcYc/20234287601.pdfIn PDF document text
    • https://ritipovilij.weebly.com/uploads/1/3/4/6/134650849/pesotideraniji.pdfIn PDF document text
    • https://davugunibelerab.weebly.com/uploads/1/3/4/6/134612729/9316347.pdfIn PDF document text
    • https://cdn.sqhk.co/nivipanevi/ezgg3id/jadedomujudusadepawurukap.pdfIn PDF document text
    • https://cdn.sqhk.co/zibepidok/gjptXhd/power_hover_apk_mod.pdfIn PDF document text
    • https://cdn.sqhk.co/jawutuwek/hdjffie/ted_baker_glasses_review.pdfIn PDF document text
    • https://cdn.sqhk.co/dudugetogi/iiUeicu/mumegeneju.pdfIn PDF document text
    • https://cdn.sqhk.co/liralimujote/p2jahhA/46367463974.pdfIn PDF document text
    • https://cdn.sqhk.co/vilonunufuk/jdjcjiz/telehealth_companies_for_mental_health.pdfIn PDF document text
    • https://gasagadivegolix.weebly.com/uploads/1/3/4/4/134488570/6187956.pdfIn PDF document text
    • https://fazokovonopa.weebly.com/uploads/1/3/5/3/135329702/pepojil-petowozemanupos.pdfIn PDF document text
    • https://munejubulogulep.weebly.com/uploads/1/3/4/2/134266186/8394282.pdfIn PDF document text
    • https://cdn.sqhk.co/xubuzivo/haidign/amazon_prime_music_download_failed.pdfIn PDF document text
    • https://cdn.sqhk.co/fuludasowipu/biciegg/74449638407.pdfIn PDF document text
    • https://cdn.sqhk.co/simumufij/o2agg40/20796791578.pdfIn PDF document text
    • https://buritozube.weebly.com/uploads/1/3/0/7/130775753/lubazezij_sutokem_kagad.pdfIn PDF document text
    • https://vikumufum.weebly.com/uploads/1/3/1/3/131398575/5987614.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/bulalowisu/wexijuragow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96b3206c-fe79-461d-a05e-f74ec3cce6a9/engineering_mechanics_dynamics_13th_edition_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/252ba616-9c9e-4305-98e6-7e2e0e8fd2b2/whats_it_called_when_you_join_two_words_together.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df5b34ca-8882-4ecf-9810-e11b8c31ac46/33634190188.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4105d909-6fc5-43d1-85cf-42f9cf823fbd/fesasugowune.pdfIn PDF document text
    • https://s3.amazonaws.com/mevuzokekenojab/37391388724.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_off0000d03a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD03A 5212 bytes
SHA-256: 7bacfbf88a7d7d01906aa722085a5b38d15b4c7a1ad96f555a25ce6e92b2f205
font_01_sfnt_off0000e211.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE211 12828 bytes
SHA-256: bc80617d1b501d78dec28b27b249c55fe25f3a72f0552d45b87dea57f9f5084c