Malicious PDF — malware analysis report

Static analysis result for SHA-256 11b8658aeab9894a…

MALICIOUS

PDF

77.8 KB Created: 2020-12-21 18:52:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b40daa4e596b3b63ef31c16fb84ebed5 SHA-1: 9b59743cf3de59f2fa304f7aca84e55dcb77053c SHA-256: 11b8658aeab9894a9c2f5c5cf9d60dfa55a32718bdef5e2e605898f78efb4931
264 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, indicating it's a phishing or redirector lure. It contains a large number of links to external websites, many hosted on disposable domains, suggesting a link farm designed to redirect users to malicious infrastructure. The presence of a QR code lure further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://gettraff.ru/strik?utm_term=best+free+police+scanner+app+for+android In PDF document text
    • https://xivenisulebitok.weebly.com/uploads/1/3/1/3/131378814/zafipaxikesexu.pdfIn PDF document text
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/raboxomi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427273/normal_5fbc82e0ea140.pdfIn PDF document text
    • https://zupagefu.weebly.com/uploads/1/3/1/0/131070313/2964e4936741.pdfIn PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/kunag.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424666/normal_5fd1fc747467e.pdfIn PDF document text
    • https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/kiwuzosopokow.pdfIn PDF document text
    • https://lurefeti.weebly.com/uploads/1/3/4/6/134683691/migef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497370/normal_5fb447ab8f304.pdfIn PDF document text
    • https://mutakisutuw.weebly.com/uploads/1/3/4/7/134768563/2402264.pdfIn PDF document text
    • https://gixujadimi.weebly.com/uploads/1/3/4/7/134708567/3c6fb9ba3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375344/normal_5fa171bc5c6f8.pdfIn PDF document text
    • https://gopaxabog.weebly.com/uploads/1/3/5/3/135309926/pikenajopazap_jufupow_letavafavuved.pdfIn PDF document text
    • https://kubududowu.weebly.com/uploads/1/3/5/3/135349078/5c83f57ad0b305.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa0073299f0c5439c50f/1606220289078/69405973465.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc50bae7d0c8f249d5b975a/t/5fca6e92f0337c20475e990d/1607102099214/star_wars_falling_down_stairs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/844a9ceb-90e0-40dd-a4e4-7c8de8b96c91/povizim.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ac84a16-702d-4a80-a570-6344a974f9d9/gorham_sterling_hollowware_patterns.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_off0000f380.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF380 5200 bytes
SHA-256: abf43235d20830b25b0512b7df10beb87419b6cf62a85ad6e68c9e8e6dc61b4c
font_01_sfnt_off00010542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10542 10648 bytes
SHA-256: 0dc8664e16ffa5f3378152e13c137663ca5d5c18f322f5a3281b5d9280aca212