Malicious PDF — malware analysis report

Static analysis result for SHA-256 b59393f80ed40d0e…

MALICIOUS

PDF

88.9 KB Created: 2021-03-04 20:26:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 9facd9f922078503349cc40ab41c250b SHA-1: c8de16dd7258c7192e2a9837900fadc1e31aed57 SHA-256: b59393f80ed40d0e32ccfa46a8d1d04ced35bad3147e646d1d89c2fb595afd63
166 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged by ML classifiers and ClamAV as malicious, exhibiting characteristics of an advance-fee scam. It contains multiple external URIs, including one pointing to 'gimoguvi.ru', which likely serves as a lure to a phishing or malware distribution site. The document's structure and embedded links suggest it is part of a link farm designed to obscure the ultimate destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/123?utm_term=white+tiger+masked+singer+performance+we+will+rock+you PDF link annotation
    • http://totudini.iblogger.org/jugagixuxelovope.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459630/normal_6040e409b29c7.pdfIn PDF document text
    • https://cdn.sqhk.co/guletema/midjiIt/20469121148.pdfIn PDF document text
    • https://cdn.sqhk.co/sofizagumup/iiakxgf/sun_mountain_golf_micro_cart_with_ez_latch.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368742/normal_60411d2943e24.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379854/normal_601848adae627.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368977/normal_5fdc0d07385d4.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/gj7jehd/10871538822.pdfIn PDF document text
    • http://jovaguduretup.22web.org/42121633368.pdfIn PDF document text
    • https://cdn.sqhk.co/xubulozirod/jOhfjju/agricola_all_creatures_big_and_small_solo.pdfIn PDF document text
    • https://cdn.sqhk.co/wofetewa/egd0zvm/petufo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://ralakevitodabaj.epizy.com/nimobuvowaretulagagebud.pdfIn PDF document text
    • http://bidanata.rf.gd/free_clip_art_powerpoint_templates.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9da872f5-71f3-41c7-91e3-7e42b84fe6eb/95884555984.pdfIn PDF document text
    • http://sikanuvigagefu.epizy.com/85789390973.pdfIn PDF document text
    • http://rimuvuvipimube.epizy.com/megituni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/859c9f25-0bcb-492a-a188-fdceacae4a05/types_of_persuasive_claims.pdfIn PDF document text
    • http://guwajogijifode.rf.gd/paburobusakexosodaj.pdfIn PDF document text
    • http://xetoluwe.epizy.com/simple_footer_template_bootstrap.pdfIn PDF document text
    • http://lozosotozaroxi.rf.gd/78524347852.pdfIn PDF document text
    • http://feruvine.rf.gd/asus_rt-n66u_custom_firmware.pdfIn PDF document text
    • http://doxikejopem.rf.gd/kepalujeregufalotavure.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_off00011bb4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BB4 5840 bytes
SHA-256: 46e20a17c562a2ad99c360034dea418dc57e3c1a3540424ddadd6911106a7cd9
font_01_sfnt_off00012f92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F92 11040 bytes
SHA-256: 5f5771bf3f2517e9de365bd249d2acf697ee527b102f3ba882b03790a9ae0a4d

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