Malicious PDF — malware analysis report

Static analysis result for SHA-256 b89c5c524b82a027…

MALICIOUS

PDF

69.2 KB Created: 2021-03-31 06:57:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: fb11ce234436fa89127b218a574f1a5a SHA-1: 165482993146ba06f669b7ecca6780a4220ac3db SHA-256: b89c5c524b82a027b6c2506b1d5f99dc8b8a1d5862afb21eaed455f6e71b0876
146 Risk Score

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. It uses a callback-phone (TOAD) lure. 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 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/wix?keyword=executive+vault+gun+safe+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4466676/normal_5fcbb95d29fc2.pdfIn PDF document text
    • http://mapebudo.getenjoyment.net/contrarian_investing.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471509/normal_5ff8c6881a8bd.pdfIn PDF document text
    • https://votopugukoz.weebly.com/uploads/1/3/5/3/135315446/basex.pdfIn PDF document text
    • http://marketes.pro/47398892991kq4vn.pdfIn PDF document text
    • https://xudapunazegiwav.weebly.com/uploads/1/3/2/7/132741045/cb8db070a53a.pdfIn PDF document text
    • https://zageporipemaza.weebly.com/uploads/1/3/4/5/134507549/193206861f48425.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408583/normal_605f8253c3fa1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496811/normal_5ff09280e2604.pdfIn PDF document text
    • https://lovizedisar.weebly.com/uploads/1/3/1/4/131437361/4fb84175e9ab14.pdfIn PDF document text
    • http://tazizinujumijoj.mywebcommunity.org/how_to_learn_all_programming_languages.pdfIn PDF document text
    • https://najigojuvunijo.weebly.com/uploads/1/3/0/8/130874658/821666.pdfIn PDF document text
    • https://xuzitimezavut.weebly.com/uploads/1/3/1/8/131856372/kolosisin_gezaluroxuvibo_xujisiteme_wumeg.pdfIn PDF document text
    • http://wemorewabadeluz.mygamesonline.org/41297322919.pdfIn PDF document text
    • http://xamoxipuwizutux.scienceontheweb.net/dujexoleko.pdfIn PDF document text
    • https://sowematawenuw.weebly.com/uploads/1/3/1/1/131164153/9208244.pdfIn PDF document text
    • http://topcabinets.xyz/fool_in_the_rain_drum_coverfmmbj.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/56aea950-86d4-4cc2-a9ce-877bdd62dc30/why_am_i_getting_skinny_fat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f755ead8-f194-4d99-ada7-465eb80f88a2/the_secret_law_of_attraction_movie_quotes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/017d73a8-40c6-4233-acf5-c3ef495c81fd/there_are_no_logon_servers_available_windows_10_fix.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cdeb9685-287f-4690-a370-abf70f766880/lirr_train_schedule_to_long_beach_ny.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_off0000cfdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFDC 5188 bytes
SHA-256: b1aad56495020f0622ab53c9aa0fc099a7fb738dbb4f9684611be2336f57fef3
font_01_sfnt_off0000e18a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE18A 11340 bytes
SHA-256: b359797db3a13b573e8db0ecd3acaf1f029b6e56115184f0a13afd5a73d17915