Malicious PDF — malware analysis report

Static analysis result for SHA-256 e17109bfd8b4cc06…

MALICIOUS

PDF

80.3 KB Created: 2021-05-12 19:34:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: c5029f7a35b2094448804f35a229e6a9 SHA-1: 77230b52cf600d3c28c1251f0144e0c017e4fec0 SHA-256: e17109bfd8b4cc060a5ac40bdc42cf9ac4f05da9b804e22e2e3599ccad58aaf8
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a large number of embedded links, many pointing to disposable domains, indicating a link farm designed to redirect users to malicious sites. The presence of external URIs and the ML classification strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://lozipotod.ru/strik?utm_term=can+you+use+a+remote+app+on+a+non+smart+tv PDF link annotation
    • https://xepevuke.weebly.com/uploads/1/3/0/7/130775471/fedisila_sefajaj.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369774/normal_604b7f51c5b29.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459326/normal_603450b6af2e4.pdfIn PDF document text
    • http://fafazegadaxe.22web.org/sample_literature_review_apa_format_6th_edition.pdfIn PDF document text
    • https://lexeparuma.weebly.com/uploads/1/3/1/3/131380616/2992407.pdfIn PDF document text
    • https://cdn.sqhk.co/xogovofofi/IKY6hem/icse_physics_class_9_solutions_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427809/normal_6068cd715a4b7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368249/normal_5fffa4461bad2.pdfIn PDF document text
    • https://cdn.sqhk.co/vawapisoxe/iiQidgc/74611697970.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489052/normal_602b12f5cb713.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
    • http://junimufik.epizy.com/spyder_python_3._6_ubuntu.pdfIn PDF document text
    • https://s3.amazonaws.com/goneduzum/why_are_coliform_organisms_used_as_indicators.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/83c8a0bc-f2aa-4555-897b-0e9a106d4b2a/rudikisoli.pdfIn PDF document text
    • http://gevorewububew.epizy.com/bapeguzo.pdfIn PDF document text
    • https://s3.amazonaws.com/wetowuzuxit/pezugavegosejelal.pdfIn PDF document text
    • http://bolesumedinix.rf.gd/juwoji.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6007f731-6b74-485e-8daa-8ac4ff37b778/what_do_the_symbols_mean_on_my_phone.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e7abe93-21ad-4ebe-820c-035e5e680474/11487000888.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/alex_rider_stormbreaker_book_synopsis.pdfIn PDF document text
    • https://s3.amazonaws.com/xarojapi/singer_4423_handbook.pdfIn PDF document text
    • http://bekelogamaju.rf.gd/general_psychological_theory_papers_on_metapsychology.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5497fc9b-00ff-4249-87d6-35eb901fd34b/rowenta_handheld_steamer_cleaning_instructions.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_off0000f092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF092 4952 bytes
SHA-256: e546fbd732a0ad291caaa6ff8fbd7c0ca330ee069fb0ab31584f7238962506b0
font_01_sfnt_off0001015a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1015A 10520 bytes
SHA-256: 16aab7821ea642878f333ea156d4b155de90ee7012dad00d58337fcd86d38a2c
font_02_sfnt_off0001255f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1255F 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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