Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0c7e51449320fac…

MALICIOUS

PDF

110.8 KB Created: 2021-03-17 05:58:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: bd1272aec56a24d795b108466004de4f SHA-1: 2a03e7d6abdaf5f7d3626c7e86960a46a1451628 SHA-256: a0c7e51449320fac56045bc451b4c8d3ac75dbea4dfd6a65c5181775b69f3a9c
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many hosted on disposable domains or link farms, suggesting a malicious intent to redirect users. The ML classifier and ClamAV detection strongly indicate maliciousness, likely for phishing or SEO spam. While no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of techniques used to distribute malicious content or lead users to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://maypoin.ru/wix?keyword=soul+hunters+awakening+guide PDF link annotation
    • https://cdn.sqhk.co/fepefudasor/vrgh3nd/unblocked_games_77_crush_the_castle_2.pdfIn PDF document text
    • https://cdn.sqhk.co/jozazixefuf/diejcij/33716870356.pdfIn PDF document text
    • https://cdn.sqhk.co/lidojuxuxiro/jflEjhz/fevufovod.pdfIn PDF document text
    • https://wisetigu.weebly.com/uploads/1/3/4/3/134357320/biretolaraxafiv-dosudo-jegijifopujor.pdfIn PDF document text
    • https://cdn.sqhk.co/vufebevefo/hSvULhc/word_link_to_previous_not_working.pdfIn PDF document text
    • https://mowejeli.weebly.com/uploads/1/3/4/6/134672800/9115ef.pdfIn PDF document text
    • https://cdn.sqhk.co/gederanew/ii3icgd/magic_poser_mod_apk_download.pdfIn PDF document text
    • http://kushtanash.ru/bodeguttmzcc.pdfIn PDF document text
    • https://cdn.sqhk.co/kujexelorite/OGFKBhb/pitch_invader_meaning_in_urdu.pdfIn PDF document text
    • http://italysummer.space/93600143230rzxnf.pdfIn PDF document text
    • https://sewobefavewekog.weebly.com/uploads/1/3/4/3/134367647/wegudazidebudaf.pdfIn PDF document text
    • https://cdn.sqhk.co/potasuregoz/jayegjN/nails_for_you_waukee.pdfIn PDF document text
    • http://gedawuxofawu.iblogger.org/barsa_tulu_film_songs.pdfIn PDF document text
    • https://cdn.sqhk.co/rutesawir/gjbsLhj/whatsapp_plus_messenger_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/befozaxulot/jTjf8ji/tegidinas.pdfIn PDF document text
    • https://cdn.sqhk.co/remavaveso/YYidhe8/modern_combat_3_fallen_nation_apk_obb_download.pdfIn PDF document text
    • http://dujaliz.iblogger.org/pedovomumutovepewoza.pdfIn PDF document text
    • http://drovazvenigorod.ru/62966146646lwiws.pdfIn PDF document text
    • http://fakitumomida.iblogger.org/ccap_application_illinois.pdfIn PDF document text
    • https://cdn.sqhk.co/zejejofe/gdhbVid/cheap_holiday_packages_to_santorini_greece.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://tedijafubivot.epizy.com/words_boyzone_instrumental_free.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_off00016526.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16526 5228 bytes
SHA-256: 4a77f00b210ea4e4efa3ea20ddb0f6d3f0753317eae3a905106aac7c4d34e81f
font_01_sfnt_off000176e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x176E4 11392 bytes
SHA-256: ce74f4e9052b358c31705ee5c10f2142db9d131245f0161809affe35780736fd
font_02_sfnt_off00019db4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19DB4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378