Malicious PDF — malware analysis report

Static analysis result for SHA-256 47a1e68e3ef00751…

MALICIOUS

PDF

91.7 KB Created: 2021-02-01 09:49:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 904f3b608dc57f430d39261b2ea651f4 SHA-1: f679c5c4aee47d299be2e0516e037e53120cdb73 SHA-256: 47a1e68e3ef00751f8b8de033e365f57c7d1e3a2aa28f35bf49730b16f5d84ab
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to host further malicious content or redirect users to phishing sites. The document body, though heavily obfuscated, suggests a lure related to 'urinalysis in pregnancy nice guidelines', aiming to trick users into clicking the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://maypoin.ru/aws?utm_term=urinalysis+in+pregnancy+nice+guidelines PDF link annotation
    • http://digitaltoolsfor.xyz/jasumabifagovatotjhbh7.pdfIn PDF document text
    • http://padlamadla.site/lang_introduction_to_algebraic_geometry2ut9r.pdfIn PDF document text
    • https://cdn.sqhk.co/pekobenew/c2dfBpZ/raft_survival_forest_2.pdfIn PDF document text
    • http://fumigatoff.online/54509106236o2snj.pdfIn PDF document text
    • http://nimened.66ghz.com/wawuboduwagur.pdfIn PDF document text
    • http://epaytds.xyz/ewha_korean_textbooku681t.pdfIn PDF document text
    • http://normab-id.com/428512501662w26p.pdfIn PDF document text
    • http://tehnotop.store/midasitepabavubepezovuxo48i.pdfIn PDF document text
    • https://cdn.sqhk.co/mekaxosur/9qjgJ4A/bunny_run_2020_jackson_tn.pdfIn PDF document text
    • https://cdn.sqhk.co/melalisopapu/lTibjhi/coffin_dance_meme_cover_10_hours.pdfIn PDF document text
    • http://auth02mobility.com/modern_furniture_stores_torontoj06zu.pdfIn PDF document text
    • https://polovetanofup.weebly.com/uploads/1/3/5/3/135330247/5a1f981.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/kozewuposoridil/actinomicosis_cutanea.pdfIn PDF document text
    • https://s3.amazonaws.com/pozokimepe/majnu_kannada_film_songs_free.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011e83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E83 5028 bytes
SHA-256: d47f236ec29f9f891e866b514ebfee91352582327e6c237ba93279a96515f297
font_01_sfnt_off00012f98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F98 10748 bytes
SHA-256: 292cc5daee5ba314b22c478d9561f023f6636a803a9798add0b8c02b3838d12d
font_02_sfnt_off0001537d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1537D 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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