Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd34793e71eb9fc…

MALICIOUS

PDF

72.9 KB Created: 2021-04-09 04:37:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6a5ad21c18d7cd0ae70e5287e90b86da SHA-1: 060357e12427014d9516fb583d2f8f11dbc16235 SHA-256: 1fd34793e71eb9fc89f9dec7e6cf6a95b05a42a9a31fa661888650b04afa6512
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://xajibur.ru/strik?utm_term=ge+cafe+30+inch+gas+range+double+oven PDF link annotation
    • https://cdn.sqhk.co/pimidima/FZghwQi/game_virus_tren_android_10.pdfIn PDF document text
    • https://pojewesam.weebly.com/uploads/1/3/1/4/131410485/tudizo.pdfIn PDF document text
    • https://cdn.sqhk.co/ninafoso/iaKjfct/waec_gce_government_questions_and_answers.pdfIn PDF document text
    • https://cdn.sqhk.co/romilononove/N2gjge0/30398301038.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489988/normal_60461e156a56a.pdfIn PDF document text
    • http://pebifakonek.sportsontheweb.net/account_based_marketing_for_dummies.pdfIn PDF document text
    • https://vapovudinawixe.weebly.com/uploads/1/3/1/4/131437980/nigavutubo_tofafetibebo_mozamaxukeromaw.pdfIn PDF document text
    • https://cdn.sqhk.co/futevanu/dGQjfpZ/best_heroes_afk_arena_july_2019.pdfIn PDF document text
    • http://tumuduwaju.mypressonline.com/runonimevewitopajibuk.pdfIn PDF document text
    • https://cdn.sqhk.co/juzosugun/Chaihgi/44831082472.pdfIn PDF document text
    • https://pexekakuxop.weebly.com/uploads/1/3/2/8/132814074/1a3e510d.pdfIn PDF document text
    • https://cdn.sqhk.co/momogajopi/U0chgZA/metallica_premium_monster_pinball.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449170/normal_5ffb8b3a6c64a.pdfIn PDF document text
    • https://rifidikebipe.weebly.com/uploads/1/3/0/9/130969129/wukewekep.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393348/normal_5fdebef68abba.pdfIn PDF document text
    • https://cdn.sqhk.co/tezofugowura/fmg2ktr/78534821697.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366033/normal_602dff029591b.pdfIn PDF document text
    • https://cdn.sqhk.co/pagupuxu/gPjgGhj/snake_river_farms_wagyu_ground_beef.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/lorugipopuxe/ansible_file_to_local_machine.pdfIn PDF document text
    • https://s3.amazonaws.com/jovekus/40466822004.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_off0000dae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE1 5820 bytes
SHA-256: d14f27b4106967637f0ec9eee161762fcb9143dbc80dfe2c733a54e21efaec0a
font_01_sfnt_off0000eeb3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEB3 11024 bytes
SHA-256: deb685587c5c0cc64ef89455617c1ddd55b60c22dc7f2bee82231003a0a540df

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