Malicious PDF — malware analysis report

Static analysis result for SHA-256 286c8a90761ed369…

MALICIOUS

PDF

89.2 KB Created: 2021-03-16 09:02:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 82396b88e6c74c790fc73f5a7b8a867d SHA-1: 2df38c61880e93cf38986cab3c062c8cf3942583 SHA-256: 286c8a90761ed36998b732b09b76a99b18683deb37ac9e023170bbc7e5bdc9c2
144 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with heuristics indicating an advance-fee scam lure. The embedded URL `https://pelibifir.ru/strik?utm_term=how+to+set+up+own+market+stall` is the primary indicator of a phishing or malware distribution attempt. The document body, though heavily obfuscated, contains text related to setting up a market stall, aligning with the advance-fee scam lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://pelibifir.ru/strik?utm_term=how+to+set+up+own+market+stall
    • http://xajavawinereko.mywebcommunity.org/7958212424.pdf
    • https://cdn-cms.f-static.net/uploads/4447649/normal_5fd791b223d42.pdf
    • https://cdn-cms.f-static.net/uploads/4485926/normal_6040df693dca1.pdf
    • https://static.s123-cdn-static.com/uploads/4375531/normal_5ff4d8af89e9f.pdf
    • https://cdn-cms.f-static.net/uploads/4467955/normal_603fa655c634f.pdf
    • https://cdn-cms.f-static.net/uploads/4493867/normal_60241bddc1ec1.pdf
    • https://static.s123-cdn-static.com/uploads/4383800/normal_5fc6dbc555bea.pdf
    • https://static.s123-cdn-static.com/uploads/4392862/normal_5fffb266c9c06.pdf
    • https://cdn-cms.f-static.net/uploads/4374536/normal_6037e2046b7cf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/89df81a0-edeb-4678-a3c4-28731f1f24b5/sony_str-dn850_price.pdf
    • https://s3.amazonaws.com/vuterijoze/how_to_use_a_graphing_calculator_online.pdf
    • https://uploads.strikinglycdn.com/files/df3e378f-1392-424e-a9b4-5264854a7ead/gabed.pdf
    • https://uploads.strikinglycdn.com/files/67406a67-a6af-4136-b742-0f82b5d9c5e8/57634081671.pdf
    • https://s3.amazonaws.com/wemupajese/beyblade_burst_mod_apk_6._2._1.pdf
    • https://s3.amazonaws.com/vaxebisapesi/duraflame_electric_fireplace_in_led_log_set.pdf
    • https://s3.amazonaws.com/loneminovu/swanson_chicken_broth_nutrition_information.pdf
    • http://wadoromutisagar.myartsonline.com/ruledirewud.pdf
    • https://s3.amazonaws.com/safago/what_is_an_event_tag.pdf
    • https://s3.amazonaws.com/zoluwivebiro/4331345956.pdf
    • https://uploads.strikinglycdn.com/files/6911e044-b15c-4cfc-a7f9-64c20214f098/lalimegokudamax.pdf
    • https://s3.amazonaws.com/zesixefe/44405826055.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00011566.bin
849111bda0d4e9614553d5c75d98fd12fcee19ed08a8ac37b8ceca98eb31df99
pdf-font-stream PDF embedded font (sfnt) at offset 0x11566 5084 bytes
font_01_sfnt_off0001269c.bin
e9a5a1f6ed95b1e3669933bb00002ad32a1708c3e0b735191cad5e02368a6c7d
pdf-font-stream PDF embedded font (sfnt) at offset 0x1269C 1800 bytes
font_02_sfnt_off00012f2a.bin
33d356661b18c2bd0bd30944fa3455d82c96080bf032b305a90e5e331d93ab5e
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F2A 11820 bytes