Malicious PDF — malware analysis report

Static analysis result for SHA-256 c068afc03bc52ac5…

MALICIOUS

PDF

100.5 KB Created: 2020-11-30 22:16:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-31
MD5: ff7bae9cfa95bcb5b45e47e6339adb18 SHA-1: 1cbeaecb7a2a604923920cd05f2ff21a29f13b37 SHA-256: c068afc03bc52ac59ff8b4ee1a05d605b762c987c0519c6a87ba5afb57ffd280
234 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links, with at least one pointing to a known malicious redirector. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting an attempt to drive traffic to potentially malicious sites. The 'SE_CALLBACK_LURE' heuristic also suggests a phishing or scam pretext. While no scripts were extracted, the PDF structure and embedded links are indicative of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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.
  • 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://traffine.ru/strik?utm_term=essc+floor+hockey+rules In PDF document text
    • https://jurexufibemoso.weebly.com/uploads/1/3/4/3/134310147/pemevovoneti.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390323/normal_5f9e7dda6ceb3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380082/normal_5fb8f5707b37e.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/pexodugosa/james_love_elementary_shelby_nc.pdfIn PDF document text
    • https://s3.amazonaws.com/zifozujiwi/amharic_music_lyrics.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e155104edf1d7780ac3e/t/5fc4da63f81c9a2a0c3af4e4/1606736488912/82505920715.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2a954239b0722913c9654/t/5fc4eda5f81c9a2a0c3d0581/1606741419764/236194082.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f64eab92-0c5c-466a-899b-7903b37074a7/microtype_game_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f043c688-326d-4cc6-afce-ad27f4fd45ac/vawazofenunamevu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdf93ff8cdb769c6a922a9/1606285632101/activate_netspend_card_western_union.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe4d434f98375720adaac1/1606307140704/54153237166.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc17dd3405d5340f32dc63c/t/5fc54b0e173fb5383b51fb33/1606765327406/34333597718.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc37eeb104edf1d779169b0/t/5fc42f1a3c6ccf69f3e35dc4/1606692635115/ludusikodiw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/deaaf410-270f-4857-820a-37ec991175b6/dugelizogemut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/177c7999-f8b4-45e8-9d4d-148f68415d85/bebe_buell_playmate.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_off00014ee7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14EE7 4884 bytes
SHA-256: c1c858b98a6d9a49893430b3d053511a80aa468c38e4f2d971191588ee2b990a
font_01_sfnt_off00015f8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15F8E 10920 bytes
SHA-256: 29ec323f2fbcda5b011350c5a73062146550b1814624f1aec698d4c15b6ff634

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