Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a771cfc74e99bbe…

MALICIOUS

PDF

85.5 KB Created: 2021-03-28 13:58:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 7e0d73a6427c460b171c7e7ec82b8333 SHA-1: 9b8103792d21ae8346341f04d0a3f3d81ce0f89a SHA-256: 2a771cfc74e99bbe0cd0750f66a51d5d83a435fc8e55409188ac78833ebaf31b
146 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. 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 0.9991

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://botokaw.ru/strik?utm_term=stihl+ms+250+used+price PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4465924/normal_6009e6aae7c44.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476152/normal_5fd2ae2e78fec.pdfIn PDF document text
    • http://ribugiwegi.22web.org/62248916615.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425909/normal_5ff4d44b7f9ec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370071/normal_600ee76d28daf.pdfIn PDF document text
    • https://cdn.sqhk.co/bitomasijelo/3Rjgpjb/zombie_gunship_mod_apk_unlimited_money.pdfIn PDF document text
    • http://kefikajutadab.22web.org/31676307414.pdfIn PDF document text
    • http://dokolifaritib.22web.org/unwind_book_3_summary.pdfIn PDF document text
    • http://xekowij.22web.org/segogikolupadedoj.pdfIn PDF document text
    • http://bivaxopepukoxi.getenjoyment.net/la_mthode_simple_pour_arrter_de_fumer.pdfIn PDF document text
    • http://pafiwuz.66ghz.com/snoop_dogg_can_t_say_goodbye.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393348/normal_6025e24c86158.pdfIn PDF document text
    • http://dijawobal.iblogger.org/sadipatugasevekod.pdfIn PDF document text
    • http://munasimowijuxi.getenjoyment.net/kofapalu.pdfIn PDF document text
    • https://cdn.sqhk.co/rifojimuna/fhdJzBO/motown_greatest_hits_full_album_youtube.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gugujis.epizy.com/lurojofapofodopo.pdfIn PDF document text
    • http://purupuladufuba.rf.gd/94696115712.pdfIn PDF document text
    • http://momoxorepuvo.epizy.com/building_information_modeling_model_management.pdfIn PDF document text
    • http://vuzuwukef.atwebpages.com/biofeedback_therapy_for_anxiety.pdfIn PDF document text
    • http://woranuganavot.myartsonline.com/sap_bpc_free_download.pdfIn PDF document text
    • http://bibosisiv.epizy.com/13_attributes_of_allah.pdfIn PDF document text
    • http://ximedamolaxeve.epizy.com/react_devtools_for_chrome.pdfIn PDF document text
    • http://jemekeluvakowop.rf.gd/behaviouralism_and_post_behaviouralism_in_political_science.pdfIn PDF document text
    • http://jetojepebonolo.epizy.com/syndicated_deal_analyzer_spreadsheet_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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010d52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D52 5604 bytes
SHA-256: f956bfb66072e39702d4ab9ba6cb4a8b18d390c6cffb499bc4e746241f8ad1e7
font_01_sfnt_off0001203e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1203E 11856 bytes
SHA-256: 4fdd023e19f58c1b074c493517a4eb4f9beb8f53c5a3e87592b22e8cd3179bbd

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