Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb2d522cd5c4fe2a…

MALICIOUS

PDF

78.2 KB Created: 2021-06-09 12:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: a6b410c0a837cbc5635d7a1327e3880a SHA-1: 53e5992f0bfa06d0f43166e67f2a96a5621f67c9 SHA-256: bb2d522cd5c4fe2a04367641116298f8562fb51819a14726283fafce66179a38
246 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable hosting services and employing SEO tactics, suggesting a link farm or phishing lure. The heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document may attempt to trick users into revealing sensitive information. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://catamma.ru/pbw?utm_term=windows+10+enterprise+key+generator PDF link annotation
    • https://teparapilaw.weebly.com/uploads/1/3/4/4/134477765/ludef_mevewituledevir_dilatinubif_wonaje.pdfIn PDF document text
    • https://kiparefewegapip.weebly.com/uploads/1/3/2/6/132682538/afbec51.pdfIn PDF document text
    • https://rafukamilijodif.weebly.com/uploads/1/3/7/5/137509327/231274de19e28c.pdfIn PDF document text
    • https://wovusowi.weebly.com/uploads/1/3/4/8/134886666/pegotevimix.pdfIn PDF document text
    • https://luribexibaw.weebly.com/uploads/1/3/4/7/134750384/jizumorazubo.pdfIn PDF document text
    • https://vavepinabuma.weebly.com/uploads/1/3/5/3/135303395/8247558.pdfIn PDF document text
    • https://narimokilef.weebly.com/uploads/1/3/4/6/134603618/a3f97.pdfIn PDF document text
    • https://gumabudisipinef.weebly.com/uploads/1/3/2/7/132712006/xapadona_wutufo_bixuserazo_luvuni.pdfIn PDF document text
    • https://manonerotorupu.weebly.com/uploads/1/3/4/6/134683358/nelerovitogotux.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gawalutibig.pbworks.com/w/file/fetch/144907155/present_simple_present_continuous_present_perfect_test.pdfIn PDF document text
    • http://zemilenasi.pbworks.com/w/file/fetch/144732195/can_of_worms_worm_farm_instructions.pdfIn PDF document text
    • http://kefatezalix.pbworks.com/w/file/fetch/144747828/sowojukowipuwewetakev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/70cc6e92-2c82-4a96-90db-dc0dee8e3b4e/harry_potter_and_the_order_of_phoenix_book.pdfIn PDF document text
    • http://wefolevemud.pbworks.com/w/file/fetch/144637638/1532615666.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/eb8f5b29-f032-4314-ace0-c5bc6bc6a7e9/how_long_to_cook_thin_steak_on_george_foreman_grill.pdfIn PDF document text
    • http://namikikis.pbworks.com/w/file/fetch/144503118/melaleuca_sol_u_mel_uses.pdfIn PDF document text
    • http://gufabewa.pbworks.com/w/file/fetch/144588387/pafogevibetimewubesi.pdfIn PDF document text
    • http://pigikeziba.pbworks.com/f/femofuz.pdfIn PDF document text
    • http://wemekojezum.pbworks.com/f/wumotamutepidurapazubiber.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f985017c-42ab-4a4c-9fd8-29b918144d45/polycom_vvx_410_handset_not_working.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/12137977-10a2-45ec-8566-77a1f0c3ed6c/23664806548.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e35250d-f7b5-4bf4-b71f-9e6e27e8f414/what_is_gold_color_personality.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e49f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE49F 5348 bytes
SHA-256: ef99f4a33f5bf1b0cde993f7604dd0c28bdbf27764732566bfb577ed9110960b
font_01_sfnt_off0000f6fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FC 11240 bytes
SHA-256: 9c490d4dab9c1ae0c331e183fb55978df80b3da7b1f03e6e82063e7bd7be4f71
font_02_sfnt_off00011d5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D5E 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378