Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ba1c47fa8649685…

MALICIOUS

PDF

70.5 KB Created: 2021-03-22 14:20:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 100c54959220ca6883ee015a9e460974 SHA-1: 70f903bc60b247f03b809e3d3f247e226c3c9643 SHA-256: 3ba1c47fa8649685d9c4fc2d4155dc3c68865cd0294a82609c8b07a0891f1dc4
126 Risk Score

Malware Insights

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

The PDF contains numerous external URIs pointing to disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing or malware distribution technique.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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/strik?utm_term=accu+chek+compact+plus+meter+lancets PDF link annotation
    • https://cdn.sqhk.co/goganededem/ieaiXhh/how_to_study_for_college_exams_quora.pdfIn PDF document text
    • http://leree4.club/68433382681plruy.pdfIn PDF document text
    • http://avit0.pro/impossible_quiz_answers_7231wyl.pdfIn PDF document text
    • http://gaxixumerimu.iblogger.org/cancer_colo_de_utero.pdfIn PDF document text
    • https://cdn.sqhk.co/rapovixovuti/igHnshf/72360634562.pdfIn PDF document text
    • http://avlto.best/samsung_syncmaster_s22b300_specificationsvzam9.pdfIn PDF document text
    • http://allfreebets.ru/726833716387oc29.pdfIn PDF document text
    • http://xadutewopitap.22web.org/druid_runestone_guide_gw2.pdfIn PDF document text
    • https://cdn.sqhk.co/zebapomiz/l8TRU2f/ben_10_episode.pdfIn PDF document text
    • https://cdn.sqhk.co/kominepoli/Vgcgjie/66076432569.pdfIn PDF document text
    • https://cdn.sqhk.co/xenotami/zqHhhgg/99357627483.pdfIn PDF document text
    • http://lisolu.org/66044148336j3r9i.pdfIn PDF document text
    • https://cdn.sqhk.co/posiraki/mMVepIb/murata_lora_module_datasheet.pdfIn PDF document text
    • https://cdn.sqhk.co/gegatuzikat/jfigQ2p/wotavajezosi.pdfIn PDF document text
    • http://homeolimp.com/20084856246yh6mn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447273/normal_6049ab733027b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424347/normal_60584ae6d2e7f.pdfIn PDF document text
    • http://price-list.moscow/any_day_of_the_week_sentence_starterstauje.pdfIn PDF document text
    • http://fatowafelu.iblogger.org/psychiatric_mental_health_nursing_8th_edition.pdfIn PDF document text
    • http://b2b-servis.ru/gagagokidibimekutatulujidfwjv4.pdfIn PDF document text
    • https://cdn.sqhk.co/tigixexaxi/d6ZK8jc/rush_limbaugh_podcast_youtube_september_28_2020.pdfIn PDF document text
    • http://dresdenpharma.ru/norton_reader_15th_editiont8gaj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d52e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD52E 5224 bytes
SHA-256: b8470d3993b79e9cf665f7fb13bd5c8df01c49de0d8fccc864aa546910d76d6d
font_01_sfnt_off0000e6c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6C5 11092 bytes
SHA-256: ea79dd293c3b29063e0ddb3d027628499c6a8bc7cab773632cca34a6000eef3e

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