Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c0b2aadda8b86f1…

MALICIOUS

PDF

74.9 KB Created: 2021-02-24 17:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: b499d17e6415ae59648ba557524a5c2b SHA-1: 184b5951b492477e69f0275cee8ac657798e4237 SHA-256: 0c0b2aadda8b86f1ffc8faf42e976cc7d742bc4d1917a3b3700746d49d60cc26
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or redirection scheme designed to lead users to malicious content. The document body, though heavily obfuscated, appears to contain search-related keywords, further supporting the lure of a search result or informational page.

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://leonvi.ru/award?keyword=what+is+the+best+way+to+store+iceberg+lettuce PDF link annotation
    • https://devaropig.weebly.com/uploads/1/3/4/6/134616199/385309.pdfIn PDF document text
    • https://timakopazasiri.weebly.com/uploads/1/3/4/4/134445807/4186461.pdfIn PDF document text
    • https://cdn.sqhk.co/fujonexa/edgQGgg/5081984481.pdfIn PDF document text
    • https://cdn.sqhk.co/lamikolo/dkgciiY/mediaf_re_download_games_gta_vice_city.pdfIn PDF document text
    • https://fotaluxig.weebly.com/uploads/1/3/5/9/135973299/kuvajezilatodori.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4467030/normal_5fe48ea3d9c96.pdfIn PDF document text
    • https://cdn.sqhk.co/lituxopevuk/pLaSgg6/falling_puzzle_rules.pdfIn PDF document text
    • https://dozunetad.weebly.com/uploads/1/3/4/4/134472758/masuloxuwefutasodof.pdfIn PDF document text
    • http://xitabijasava.getenjoyment.net/aqualink_rs4_troubleshooting.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405654/normal_5febb36defc50.pdfIn PDF document text
    • https://cdn.sqhk.co/sixitigoxeto/bhac5ia/led_xbox_controller_amazon.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496584/normal_5fc5e53070b14.pdfIn PDF document text
    • https://cdn.sqhk.co/talexadu/gh6hanI/54238624128.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391327/normal_5fe87a5f9b5eb.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tefetuzuzip.myartsonline.com/how_to_repair_windows_10_corrupted_system_files.pdfIn PDF document text
    • https://s3.amazonaws.com/viwoxuz/rokozegepujojixuxiwoz.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/susezulenawapamanukogaxe.pdfIn PDF document text
    • https://s3.amazonaws.com/najubu/borderlands_2_level_50_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/rurovikejigibu/80792031737.pdfIn PDF document text
    • http://pikubub.onlinewebshop.net/how_to_cook_rice_in_the_electric_pressure_cooker.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_off0000e924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE924 5408 bytes
SHA-256: f88fd302fca6be6dd5fe0566f4a3c008db7232bfd012ec6bea0ac372389e06b9
font_01_sfnt_off0000fba3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBA3 10196 bytes
SHA-256: a25b5e76ea803c96f8393a9cb05dddefe653f2b698fa815c3574208742285027

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