Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d3e62fa7c121624…

MALICIOUS

PDF

76.1 KB Created: 2021-05-31 23:26:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 1d17c0684cb14472c3fc846897ad9a49 SHA-1: 50692c46d1b37d6991c92214d88ab614c62eccfc SHA-256: 2d3e62fa7c12162483167338085b21e3545ead50ec3a08351ba00a636a9034ac
186 Risk Score

Malware Insights

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

This PDF document exhibits characteristics of a phishing or SEO spam campaign, indicated by the high number of external links, many pointing to disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure itself is used to host a link farm, potentially for distributing further malware or conducting phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • 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://mezovuduw.ru/123?utm_term=manasquan+beach+surf+report PDF link annotation
    • https://kifowufowuvix.weebly.com/uploads/1/3/5/3/135392599/6543095.pdfIn PDF document text
    • https://fuzalufukaxod.weebly.com/uploads/1/3/4/7/134714992/8118012.pdfIn PDF document text
    • https://rowusebejaron.weebly.com/uploads/1/3/1/6/131637242/kosaviwidej_fezedisima_bowevafaz_fowuti.pdfIn PDF document text
    • https://napajudiweji.weebly.com/uploads/1/3/4/3/134316113/7813875.pdfIn PDF document text
    • https://tenekitu.weebly.com/uploads/1/3/4/0/134018212/bipegidimidubagavo.pdfIn PDF document text
    • https://veburuja.weebly.com/uploads/1/3/0/7/130739173/pavumefazamafiwi.pdfIn PDF document text
    • https://jezugazaditok.weebly.com/uploads/1/3/4/6/134601365/9245646.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nilanom.pbworks.com/w/file/fetch/144415713/how_to_use_the_i7s_tws.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3754a4bb-0367-4822-bf6d-85bf8f06af2d/17991450634.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5bdfc8a-c7af-4839-84ac-11d615a03fb7/how_to_connect_toshiba_smart_tv_to_wifi_without_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da7aacc4-297c-4b8c-998e-ddfc39fe0aaa/tonedoperoridub.pdfIn PDF document text
    • http://tebejeloxid.pbworks.com/f/weber_cutting_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/07a7d3f1-6965-406e-8400-9bc9ddd314e6/kateropufijofixapuxodozon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f40da2-622c-4680-89f4-a2d751576f35/3_tamil_movie_sad_bgm_download.pdfIn PDF document text
    • http://lijegazoz.pbworks.com/f/why_is_my_direct_wire_smoke_detector_beeping.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0946452a-9aae-4973-8e6e-19de3ca16b82/56537301528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bab6f70d-d5f4-4eb9-9342-7607b4a01e82/lirakowiwomugomuli.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/179ce23f-d92c-4248-980b-42100317ac45/rusisel.pdfIn PDF document text
    • http://tagexoba.pbworks.com/w/file/fetch/144422670/rukaxodegepofamopigi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fa0393d-2788-481b-b728-87ccd209cbe7/16514035374.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_off0000eb7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB7E 5340 bytes
SHA-256: 17944b7d00b15148aa7ce8af850d930abc3173d19854454bbfc9b76c2dae5785
font_01_sfnt_off0000fdb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDB1 11068 bytes
SHA-256: 8f8967eb902fec16794a21204721e06674130f7ccfea272de3123acee70bc93b