Malicious PDF — malware analysis report

Static analysis result for SHA-256 50af694f79703786…

MALICIOUS

PDF

67.3 KB Created: 2020-11-11 17:26:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 42cd34ec2b7c0c97139d2ea1073d4b39 SHA-1: b78e9a76b8fee35a2f5dccd172a9b41682f5f118 SHA-256: 50af694f797037860b57cc59a137fd5b1cca35f783bba3ed8cb664b49c154f3a
214 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. The file embeds a large number of external links characteristic of an SEO link farm and routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://cctraff.ru/strik?utm_term=dragon+age+origins+jammers+stash In PDF document text
    • https://cdn-cms.f-static.net/uploads/4366993/normal_5f89560f707ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5fa479c2e5f7b.pdfIn PDF document text
    • https://zunesevofulopu.weebly.com/uploads/1/3/4/3/134385883/segojetuwif-zuwisomelababew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426972/normal_5f9920619f348.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f875c06bc2da.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381294/normal_5fa374db76864.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405651/normal_5f979e8e82f0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413368/normal_5faa725fef52a.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/sugaguxagu/arabian_nights_story.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0197637c-915b-4f65-b319-cfaa5c7d5b14/walter_piston_orchestration.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/78054a30-491d-45a9-8444-8c00cfff5dcf/20000745385.pdfIn PDF document text
    • https://s3.amazonaws.com/buxoparadazegu/internet_advertising.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cb6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCB6D 5140 bytes
SHA-256: a9e37a38d27f2406848e303843a7e12fe6f9741e2e379fd88e09e79d2e1b9009
font_01_sfnt_off0000dcc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCC7 10592 bytes
SHA-256: 0b63d7d87c2f2433098a9ea3b2c8ca5459656a11056ce2375a0459f14ad7b607

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