Malicious PDF — malware analysis report

Static analysis result for SHA-256 0996d0097c88a2cd…

MALICIOUS

PDF

84.5 KB Created: 2021-04-28 10:19:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 617918320f878874433420b0833ffc6d SHA-1: 3f644b6d77c0a5c0249eddf542297224a78a38f9 SHA-256: 0996d0097c88a2cd75ad11f388e16111733118ec189057f966ef877b729b64ac
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable hosting and exhibiting link farm characteristics, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded links are consistent with techniques used to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://gimoguvi.ru/strik?utm_term=do+you+need+a+dj+for+a+wedding PDF link annotation
    • http://luwinilulurop.mywebcommunity.org/buffer_system.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404108/normal_5fd60beea3c7b.pdfIn PDF document text
    • http://jivavesomuviz.getenjoyment.net/single_phase_asynchronous_motor.pdfIn PDF document text
    • https://cdn.sqhk.co/webuzifinuno/gh1hi4A/80766387026.pdfIn PDF document text
    • https://cdn.sqhk.co/biwezabob/pjb00jc/wukozikobefuxuzitonewo.pdfIn PDF document text
    • https://cdn.sqhk.co/kerutadit/6hjqRZT/jekugezozidigunewevowuzok.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447093/normal_604ebe1dd7fcb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381543/normal_5ffccdcbaae27.pdfIn PDF document text
    • https://cdn.sqhk.co/bafujifi/idjjghe/the_banner_saga_trilogy_switch.pdfIn PDF document text
    • https://cdn.sqhk.co/zuxosutuku/c903thd/candy_cat_rescue_bubble_shooter.pdfIn PDF document text
    • http://xadexawufomovi.sportsontheweb.net/38782268507.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414864/normal_6018be320691f.pdfIn PDF document text
    • http://wewogokuwidu.mywebcommunity.org/types_of_case_study_method.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446377/normal_600818fd671df.pdfIn PDF document text
    • http://zoluwofemofuper.sportsontheweb.net/famegane.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/c05f376e-c9d4-4450-9763-2669c6c04b7b/20_thousand_leagues_under_the_sea_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e3539e6-762c-4fef-9f41-1b9f6c9c1dd2/mogonutokaniwizo.pdfIn PDF document text
    • https://s3.amazonaws.com/baritexovopa/sonicwall_analyzer_reporting_software_installation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85599cbb-ebc8-4f64-81e8-42397423e0e5/how_to_win_class_president.pdfIn PDF document text
    • https://s3.amazonaws.com/jutenojamega/sasijabitupaneterosiv.pdfIn PDF document text
    • https://s3.amazonaws.com/jodabiladezot/descriptive_essay_definition.pdfIn PDF document text
    • http://womawujun.atwebpages.com/mapazuzapulu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/02aa3a36-7d89-409a-a00f-97569d72302e/gokonoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a470aed3-0978-493c-a22e-91f250547091/takofukubexexulene.pdfIn PDF document text
    • http://gejizejaniwijef.atwebpages.com/47645261621.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f987.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF987 5136 bytes
SHA-256: 2c0ccbe9ca93d238d9ae5d6b5cd64fb06892bf979e655f685bc279fb558fd9a2
font_01_sfnt_off00010b2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B2C 6920 bytes
SHA-256: e9e8093fd2d1da5b18272a11f6aa68bbc429cbca6805f21889bdd487860eab88
font_02_sfnt_off00011da0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DA0 11228 bytes
SHA-256: 47ac288367022be7b73a5c3f20ead38fe2e74f1df61fdabbfa965f66db939dba