Malicious PDF — malware analysis report

Static analysis result for SHA-256 aaa6318e2db3586d…

MALICIOUS

PDF

85.4 KB Created: 2021-05-06 16:50:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 9cedb0ae6de07152f28dbda304e282ba SHA-1: d3bffc6e9f63c9c15a5e7d0f19859f0d91f33f50 SHA-256: aaa6318e2db3586d1cfef1bd5e17a36f2982e98f087c8e11a686a9b3281724a6
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing or malware distribution lure. It contains a large number of external links, many of which point to PDFs hosted on various domains, suggesting a link farm or a method to obscure the ultimate malicious destination. The document body, though heavily obfuscated, appears to be a lure related to removing a soap dispenser, which is likely a pretext to drive traffic to malicious sites.

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 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.
  • 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://bologen.ru/strik?utm_term=how+to+remove+simplehuman+soap+dispenser PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4404497/normal_5fdb7959ca4f5.pdfIn PDF document text
    • https://cdn.sqhk.co/jurugaguvedu/eiagiRu/cookie_clickers_2_apk_hack.pdfIn PDF document text
    • https://cdn.sqhk.co/podogule/hdbhdid/keto_cooking.pdfIn PDF document text
    • https://cdn.sqhk.co/rowunozimop/lVXBEhg/the_walking_dead_network_abbr_crossword_clue.pdfIn PDF document text
    • https://cdn.sqhk.co/mevazasid/dJiiDie/sukanufabajuvito.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366017/normal_60318fd4aa0c7.pdfIn PDF document text
    • https://zulafadosulivi.weebly.com/uploads/1/3/4/3/134305332/kiraratifozudunujenu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499942/normal_6018764e374ca.pdfIn PDF document text
    • https://jipofaxinevafud.weebly.com/uploads/1/3/4/3/134350183/potegawik-madadofened-pupujelevi.pdfIn PDF document text
    • https://cdn.sqhk.co/ramazunor/gh2Rhgg/siwilosefabeliwes.pdfIn PDF document text
    • https://cdn.sqhk.co/nosilaxuziz/FgebjdL/roweledivoxalunukodonax.pdfIn PDF document text
    • https://fuborevotoxuto.weebly.com/uploads/1/3/4/0/134017795/mosesizesewepeb.pdfIn PDF document text
    • https://cdn.sqhk.co/gukisafuw/hhEiebO/34261115827.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465402/normal_6007ca35af098.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2176746-8037-44bd-852a-b0beec420ca2/best_flip_phone_for_seniors_t_mobile.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9273401-329c-4705-a0d3-b449268e3cfa/34542386095.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ef0aee1-0cc4-43eb-8665-59a4298525f0/lewoforenomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13714b34-7e22-4c52-9529-d8fe99de9fd6/cfa_exam_level_1_registration_deadline.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_off000111a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A2 5312 bytes
SHA-256: 21f9b1a095835beb6129d437577f1de7b4db25eaf8db852a54ca065081462286
font_01_sfnt_off00012397.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12397 10764 bytes
SHA-256: 6e8dc9ef3ebef35f66ed91af760d32bca563db10774935a4639439887f472c96

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