Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce90a9195bd609d…

MALICIOUS

PDF

65.2 KB Created: 2020-11-11 02:52:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: ac6410d7deedda7181a45c1f7e906d2b SHA-1: 1173ab685fe6440a324687fba1eac02b2b2565b1 SHA-256: dce90a9195bd609d90a91e2d0e1123e387e2b619e0a4d8f6f379f3a299e1ab19
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics, including ClamAV and an ML classifier, as malicious. It contains a large number of external links, suggesting a link farm or SEO manipulation tactic. One of the extracted URLs, 'https://trafftec.ru/aws?keyword=secret+garden+movie+cast', is particularly suspicious and likely serves as a lure or entry point for further malicious activity. No scripts were extracted, but the PDF structure itself is indicative of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • 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://trafftec.ru/aws?keyword=secret+garden+movie+cast PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4418170/normal_5f9cd23320f96.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368758/normal_5fa3ec6d89647.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393181/normal_5f8f5bce0128d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366029/normal_5f89c3ce758a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365639/normal_5f8758bd2468c.pdfIn PDF document text
    • https://saxejuwujare.weebly.com/uploads/1/3/4/4/134448786/9809206.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481055/normal_5fa94ccdd725e.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/xedobox/vht_wrinkle_black_paint_advance_auto.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75db2ac8-a5eb-4f69-b189-5c299842a890/manual_de_cocina_profesional.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/901522a0-d069-46ea-86e2-92eafc8a96f9/66279647530.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/abdc0ba8-0db8-4c1f-81b2-f04d4cd720ce/kuwetumelikijuvojinu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ca3a739-78e8-4f69-b1bc-3a7da5b390e4/digekujojuverikegonagatak.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39f1c85c-d1ae-432d-bd5c-fafb178d8795/jujojutujifofuxopukikovud.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_off0000c24c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC24C 5392 bytes
SHA-256: be053dc0254db5d9783574ceb2f017fc75ee0f1e4ddaa0e4be1d6a1cf6babf38
font_01_sfnt_off0000d491.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD491 10404 bytes
SHA-256: 66f754ceb8752393c9ae6b01ebfc0dc557e73633a13ad3041938c80cd8debecd

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