Malicious PDF — malware analysis report

Static analysis result for SHA-256 d572097770eb6a72…

MALICIOUS

PDF

67.4 KB Created: 2021-02-08 06:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 29280bd9d83eca28dddc0bd6a4078475 SHA-1: 99bfe949f55cef8fb24a0d04403a5735cfe5e2c3 SHA-256: d572097770eb6a72753ce018b29ee99aaa39729ca16df041313af15d0c34031d
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable domains and are flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://druttle.ru/123?utm_term=crosman+pumpmaster+760+parts+list PDF link annotation
    • http://detonic-ro.website/access_bars_kitape7o67.pdfIn PDF document text
    • http://losqutoq.online/fagusadujutasuxobum9dpk7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405641/normal_601b53cff1ef2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_6020b979dc24b.pdfIn PDF document text
    • http://ionatr.space/841938616647h8dx.pdfIn PDF document text
    • http://testertumentum.space/bujoxoloxoruwubuvuravur0zc0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425768/normal_601bb3f65188d.pdfIn PDF document text
    • http://help-igcopyright.xyz/3__slots_slots_slotsp4pjz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475196/normal_5fd96e330af83.pdfIn PDF document text
    • http://resimpub.com/wef_world_competitiveness_report_2018a8wnl.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4484375/normal_5fcba30d63a05.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450438/normal_5fcf362c8184f.pdfIn PDF document text
    • http://lobomizozage.iblogger.org/javadeniwubuwuv.pdfIn PDF document text
    • http://bigno.space/d_day_1944_game_download7s796.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lirebeto.rf.gd/lagu_melayu_mp4_free.pdfIn PDF document text
    • http://lolofekigosot.epizy.com/ccna_2_chapter_5_exam_answers_2017.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_off0000ca0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA0E 5248 bytes
SHA-256: a85a1747938bff64c4cff560b9d4fe420a8ed15598cd5860e5c4ab7ea72ac2d5
font_01_sfnt_off0000dbcb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCB 11236 bytes
SHA-256: cca6cc1b0e6abe29e163fc72e479d5d30ebcba220a02e109cef1c1ea6ef10c7a

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