Malicious PDF — malware analysis report

Static analysis result for SHA-256 e354d9effd9ecf7d…

MALICIOUS

PDF

80.9 KB Created: 2021-05-03 11:29:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6abaf6a8627b4a898c94a3426f2fbc40 SHA-1: 5d6a66b12f7abbb08710247b115a1880978d80bf SHA-256: e354d9effd9ecf7dc7795a4df6e6c845ab94e1782a5faaf2581db39bdf2a4d1c
186 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 as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://nipisod.ru/strik?utm_term=reasons+to+stay+alive+matt+haig+synopsis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4421478/normal_6059c3e35676d.pdfIn PDF document text
    • https://cdn.sqhk.co/wexunaveb/iysidia/buysell_stock_trade_game_accounts.pdfIn PDF document text
    • https://cdn.sqhk.co/wibononuve/gOMv2ic/55406911535.pdfIn PDF document text
    • https://cdn.sqhk.co/demejapad/eijjfjs/89285548617.pdfIn PDF document text
    • https://cdn.sqhk.co/xagaxubibiz/H5ifhco/learn_python_programming_free_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/jj5c8id/goat_simulator_local_multiplayer_pc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372373/normal_5fdbdbc79d03d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4502906/normal_60059e45d230f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460263/normal_5fe734e012ef0.pdfIn PDF document text
    • http://lanutovuvilug.iblogger.org/11614885716.pdfIn PDF document text
    • https://cdn.sqhk.co/jumifokujuje/ihghRgd/jofuguwewudekibolaxok.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nidemavaguwagev.rf.gd/adobe_photoshop_cs6_free_for_mobile.pdfIn PDF document text
    • https://74fc1a11-d445-4ffb-bc6b-7a79e5a65a18.filesusr.com/ugd/097bd5_3401f3b177fc4ab09c5701667f57a501.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kegubinefuda/fisher__paykel_dishwasher_dd605_manual.pdfIn PDF document text
    • https://24976a62-ea59-4ca6-8500-d0bd08f9a094.filesusr.com/ugd/65a075_aa6a4f5eb8c2481f9d67bc3262e930a8.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xotomisen/batexudorewidof.pdfIn PDF document text
    • https://c3373aeb-ed74-4f2d-b631-fa679e0a3f6f.filesusr.com/ugd/cbe7f7_0651de21f3904e6db67f19d924a7a2bb.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/zibenoroduzuw/tekabedozazigu.pdfIn PDF document text
    • http://zuvolape.epizy.com/71640050319.pdfIn PDF document text
    • http://tuxebawiwerusu.rf.gd/vapewi.pdfIn PDF document text
    • https://fd7a53fe-11c1-4e60-83ad-ac1bb997268f.filesusr.com/ugd/5cf23b_86a527e698d14d4c82801cedc5942d07.pdf?index=trueIn 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_off0000fef9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEF9 5304 bytes
SHA-256: 056efe73d4443b082ef1f9e3653b8782a694e51c5e31f716e405a2bce5c52fe8
font_01_sfnt_off000110f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110F9 10912 bytes
SHA-256: 52a4e6d37766aad7de4a7ca6791e030f95ee55847e6e46dcf5db77da9d5186f6

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