Malicious PDF — malware analysis report

Static analysis result for SHA-256 a69f1354d729d4cb…

MALICIOUS

PDF

94.0 KB Created: 2021-04-17 04:22:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25
MD5: f8a2f7ff1a132688d2bd89289a85a0ca SHA-1: 2795b7fca1f0a5b658672fe74b3760c0a3a68771 SHA-256: a69f1354d729d4cbc8a00bebfce162ea9766ae0101dc383d43bfbbfc51f58ac2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains multiple external URIs, including one pointing to 'xezojetit.ru' which appears to be a lure for a game download. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for malicious links, further supporting the phishing or malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://xezojetit.ru/strik?utm_term=is+tom+clancy+the+division+multiplayer PDF link annotation
    • http://afracheat8.xyz/dowoxemeotw.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378404/normal_604e8ee46ee8a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388038/normal_603bebc4bea2c.pdfIn PDF document text
    • http://watercart.ru/16685299393iyfvl.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371004/normal_5fd36a3283185.pdfIn PDF document text
    • http://dress-russia.ru/run_race_3d_download_uptodown7t6cn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427783/normal_606e6d6f15e74.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493917/normal_603b3e744079e.pdfIn PDF document text
    • http://witaxolexigabi.mywebcommunity.org/diploma_applied_science_book.pdfIn PDF document text
    • http://jatukamopefu.22web.org/delenawapajopoku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418579/normal_5febaab8e9d70.pdfIn PDF document text
    • http://pibakulisup.medianewsonline.com/51274317612.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470968/normal_605825ee00237.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454965/normal_6051c9fa3613e.pdfIn PDF document text
    • http://allerlo.xyz/wujejavetinosuriwiguassmp.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/a4ffabc2-86e3-4846-a104-0d28ada89283/90597890140.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d89da462-af0b-459c-bf10-b3774f98a3ae/porter_cable_c2002_type_3_regulator_parts.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/gavupidavixe.pdfIn PDF document text
    • http://gogadotonirad.rf.gd/84629008471.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8704713-c692-4865-bf9c-e0b016e7a5ff/can_you_order_a_new_roku_tv_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7876c983-f8b7-4d2d-b699-916e9db55869/mawitekobawozilajubeni.pdfIn PDF document text
    • http://puwomuf.rf.gd/water_supply_and_sanitary_engineering_in_gujarati.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ac2fe8-a28e-4d27-b9a3-e47bacf2b4a8/67382076673.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_off000132e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E1 5412 bytes
SHA-256: affc0d8a7fa1450eb1626b7a294324e7fe662d07b720e8851f4d4485277c4e19
font_01_sfnt_off0001452a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1452A 11080 bytes
SHA-256: ad415bbdc693361de64de354a36f2c82b9b612fae1935a8a2cddfa4ab487ca31

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