Malicious PDF — malware analysis report

Static analysis result for SHA-256 e02db84f7cb9e60e…

MALICIOUS

PDF

77.4 KB Created: 2021-03-28 09:59:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5959852d6ae8bb5f1c31db5e046d0ef1 SHA-1: 2ed39aa5b36d968e5ce00d15c1675e685b875d6a SHA-256: e02db84f7cb9e60ec9d128747335529be280e9b6f2a14e5f2e2fd83d72c1e018
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_LINK_FARM' and 'PDF_SEO_DISPOSABLE_LINK_FARM' indicate a non-clustered link farm on disposable hosting. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

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://midufefew.ru/award?keyword=business+introduction+letter+pdf PDF link annotation
    • https://cdn.sqhk.co/vixawutozama/jjiibhj/mummy_returns_full_movie_download_in_telugu.pdfIn PDF document text
    • https://temeromaxuzi.weebly.com/uploads/1/3/4/7/134745627/tajesowarinojomanefo.pdfIn PDF document text
    • https://lekopejener.weebly.com/uploads/1/3/5/3/135323345/739522.pdfIn PDF document text
    • https://gegivibubijob.weebly.com/uploads/1/3/4/5/134507206/xivifowuwomudigakin.pdfIn PDF document text
    • https://cdn.sqhk.co/ratugetaj/97jfxgh/toravitovusewiduzowup.pdfIn PDF document text
    • https://lakogobeza.weebly.com/uploads/1/3/4/0/134096968/famodowizi-lujixi-pozebugavo.pdfIn PDF document text
    • https://vubeluzuge.weebly.com/uploads/1/3/4/3/134357782/266203.pdfIn PDF document text
    • https://cdn.sqhk.co/gadukupuwe/Ehghc4u/fokoxozos.pdfIn PDF document text
    • https://cdn.sqhk.co/badalozebale/OibRije/r_type_2_rom.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/ef2e2daf-4ed8-4ea7-8a21-5f1feaa88ceb/alpine_iva-w505_factory_reset.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c3ecebe-5f5e-4ff5-aa11-68f48b3433a3/5569473292.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01a64f6b-3885-43ac-be2b-8493203fcdbb/lord_of_the_flies_chapter_2_summary_quiz_gapfill_exercise_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d58cf385-ed22-449b-9111-5fc4a086486b/what_chinese_takeaway_dishes_are_gluten_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cd738521-fe04-4cd5-860c-c62670ebabf3/international_business_development_jobs_melbourne.pdfIn PDF document text
    • https://s3.amazonaws.com/xijalovelokolep/xelamefulemixavavowipaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbaf092f-b0a4-41dc-a297-17eb01672fe5/how_do_i_set_up_answering_machine_on_my_panasonic_phone.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/harry_potter_universal_studios_orlando_wand_shop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e113e265-458c-4e56-bcd8-14ec2eb9eb8d/ashrae_handbook_1997_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f1826fff-a752-48c5-a7a7-7a1323312536/final_fantasy_7_characters_wiki.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4422118-0a35-400f-85d6-47f4dd7c2e3e/cant_sync_vivofit_jr.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_off0000f3ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3EC 4988 bytes
SHA-256: 6ab75a56dde2061c78002f9adb01b99fb71b911e99da5f68fdc7b23eb07d49d3
font_01_sfnt_off000104fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104FB 10388 bytes
SHA-256: 5cef17106b04e606296c9f72d22696c520ea51f83df9e27816790fccf4371986