Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6bac1c494a70fac…

MALICIOUS

PDF

80.6 KB Created: 2021-02-26 19:57:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 34d42b779d3ea98c950de635a7ec6669 SHA-1: a2f43c56036a56b734fa851661c11d9558033882 SHA-256: e6bac1c494a70fac94c8961bb4145558f1dc26be07468bef729c65e9f4f1523a
126 Risk Score

Malware Insights

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

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious, specifically as a phishing or trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution attempt. The document body, though heavily obfuscated, appears to be a lure related to search queries, aiming to trick users into clicking malicious links.

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://vilenefex.ru/123?utm_term=what+is+formula+for+finding+area+of+a+square PDF link annotation
    • https://cdn.sqhk.co/xubipoxeguza/WyHgiYc/mod_among_us_always_imposter_ios.pdfIn PDF document text
    • https://cdn.sqhk.co/runetonorox/hend2k4/free_robux_hack_codes_2020.pdfIn PDF document text
    • http://bejisosubonito.sportsontheweb.net/lord_of_the_flies_questions_chapter_1_and_2.pdfIn PDF document text
    • https://kakagigaj.weebly.com/uploads/1/3/4/6/134684555/tolenuku_lowegetirezedez_nujekuxaro.pdfIn PDF document text
    • https://fimezerix.weebly.com/uploads/1/3/4/4/134478386/silapikusun_wedet_wokakov_zisinezetiz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417997/normal_5fda817c7ca22.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488556/normal_5fe24a55a607b.pdfIn PDF document text
    • https://dejizova.weebly.com/uploads/1/3/3/9/133986792/bukem.pdfIn PDF document text
    • http://wijasagasipode.getenjoyment.net/critical_history_of_western_philosophy_y_masih.pdfIn PDF document text
    • https://cdn.sqhk.co/muxuzoxipopa/jfGOS62/backup_cloud_storage_location.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nakeviw.myartsonline.com/taxoludid.pdfIn PDF document text
    • http://gizimup.epizy.com/the_art_of_racing_in_the_rain_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/bexolamabad/cute_bunny_images_free.pdfIn PDF document text
    • http://wejufutaz.onlinewebshop.net/superstar_3900_service_manual.pdfIn PDF document text
    • http://beperedusewigu.epizy.com/lipid_guidelines_latest.pdfIn PDF document text
    • https://s3.amazonaws.com/teximikamukubo/74646873543.pdfIn PDF document text
    • http://bifovigavij.myartsonline.com/tejerawa.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_off0000fa1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA1F 5460 bytes
SHA-256: 62d87404bd804b551d3e0c774e0b0aef4ad7f5f0bac3cb948a7b5c4ff1e714e5
font_01_sfnt_off00010c8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C8E 11716 bytes
SHA-256: c81f4be2088d2dcdbd2c782185d3daea83e0ae5da77d10b5bd0486326170480d

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