Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b7156897287838…

MALICIOUS

PDF

75.0 KB Created: 2021-02-27 17:11:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 834663c0ef9d105ca38b1955988280c8 SHA-1: 0025cd7313a432b1ce23ebeef6c7f2d4f69482de SHA-256: e9b7156897287838f819061be2e576779b0aff421d3285f8fcffae5479de88fe
166 Risk Score

Malware Insights

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

The PDF document contains a link that purports to offer a trainer for the game Far Cry 4, likely as a lure. The heuristic 'SE_PASSWORD_ARCHIVE_LURE' indicates that the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://xajibur.ru/wix?keyword=far+cry+4+trainer+gamepressure PDF link annotation
    • https://saredikov.weebly.com/uploads/1/3/0/8/130874194/xixudulivof.pdfIn PDF document text
    • http://lazategomid.scienceontheweb.net/how_much_is_hp_pavilion_15.pdfIn PDF document text
    • https://fumujalepobuxav.weebly.com/uploads/1/3/0/8/130813876/884084.pdfIn PDF document text
    • http://kekijojovif.sportsontheweb.net/how_much_does_it_cost_to_train_as_a_forklift_driver.pdfIn PDF document text
    • https://difanewoxapazu.weebly.com/uploads/1/3/5/3/135321324/7804501.pdfIn PDF document text
    • https://fezizijopugasu.weebly.com/uploads/1/3/4/8/134850826/pelizavilunajo.pdfIn PDF document text
    • https://najovukuno.weebly.com/uploads/1/3/1/4/131453374/957478.pdfIn PDF document text
    • https://dexanobibe.weebly.com/uploads/1/3/5/2/135299911/fofimowasexutapuvese.pdfIn PDF document text
    • http://stakingyfi.com/45849738011d3gjb.pdfIn PDF document text
    • http://lazujifoxupa.getenjoyment.net/daketumubupizo.pdfIn PDF document text
    • https://xevefozivoro.weebly.com/uploads/1/3/5/3/135339272/pogudev.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://supuwevul.atwebpages.com/88901347305.pdfIn PDF document text
    • http://sobikunukozi.rf.gd/aoc_monitor_e2752vh_manual.pdfIn PDF document text
    • http://zimopup.myartsonline.com/samsung_rf261beaesr_water_dispenser_not_working.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_off0000e9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 5364 bytes
SHA-256: d14c2719532910f704829dd9509546a4dc31715b7186599b798bc3c0c3410e31
font_01_sfnt_off0000fc19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC19 10184 bytes
SHA-256: 10e099c5204d7efd0686e6a16b526116982fec825c3860fce8730a5e553968c1

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