Malicious PDF — malware analysis report

Static analysis result for SHA-256 39f8bf0e0eb2b5e3…

MALICIOUS

PDF

76.4 KB Created: 2021-03-29 21:41:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 6533a2dd34d83a7602b9ddea5b97526c SHA-1: 2451f6d79bd304c208ca0c323bb18cd9e502f9ac SHA-256: 39f8bf0e0eb2b5e3b8fb502fe75a8824138162f844555e9553255d88c3baa4ec
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains, indicative of a link farm used for phishing or malware distribution. ClamAV detection and ML classification strongly suggest malicious intent. The document body, though heavily obfuscated, contains keywords related to a TV show, likely serving as a lure to entice users to click on the malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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/wix?keyword=girlfriends+guide+to+divorce+season+5+premiere+cast PDF link annotation
    • https://cdn.sqhk.co/famagafe/hcgdiiC/8181453989.pdfIn PDF document text
    • https://cdn.sqhk.co/ributexovek/SQgdlih/38108628953.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386079/normal_6059f4c9c5120.pdfIn PDF document text
    • https://cdn.sqhk.co/sixepatexup/dihVfij/wepafumurixa.pdfIn PDF document text
    • https://cdn.sqhk.co/lebexuzo/hejiGz4/photo_on_birthday_cake.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449781/normal_602236e7593b8.pdfIn PDF document text
    • https://cdn.sqhk.co/vulovosovem/cYWighi/contract_whist_2_players.pdfIn PDF document text
    • http://raguvigawak.mypressonline.com/agriculturist_certificate.pdfIn PDF document text
    • http://foripekomufotir.mypressonline.com/why_does_my_epson_printer_not_recognize_ink.pdfIn PDF document text
    • https://cdn.sqhk.co/xegunorasu/geiaYhb/89264006602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484610/normal_604d1dbe2e441.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445877/normal_5ff17df9d4ae7.pdfIn PDF document text
    • https://cdn.sqhk.co/gesuxafom/zsgdphj/26840252040.pdfIn PDF document text
    • http://dasazopemobor.mywebcommunity.org/59087231343.pdfIn PDF document text
    • http://ourfutures.space/hitmonchan_evolution_sword_and_shield643z7.pdfIn PDF document text
    • https://cdn.sqhk.co/kufagilan/KYZjhgc/xikesozuxefo.pdfIn PDF document text
    • http://particulier-societegenerale.xyz/jilewabotipumuv1x3r7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zesafemumibow.myartsonline.com/16320350738.pdfIn PDF document text
    • http://vimixof.onlinewebshop.net/maha_satipatthana_sutta_in_hindi_free_download.pdfIn PDF document text
    • https://s3.amazonaws.com/fosawef/supasewezasuraxafar.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_off0000eab4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAB4 5692 bytes
SHA-256: 638cdc28a4383a18704cfbc89aeff78115edfb7b317e04df4a3ea45400b5b47b
font_01_sfnt_off0000fe10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE10 10652 bytes
SHA-256: 57829a32928bcb62585ced7b7e1ce929f9097a1a55f5b2503e3daff94117819d

Open this report in the interactive analyzer, or submit your own file for analysis.