Malicious PDF — malware analysis report

Static analysis result for SHA-256 6dc749426dbab491…

MALICIOUS

PDF

79.7 KB Created: 2021-04-08 09:48:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: a90faf9a859ea4500fdfef3d1e305f1f SHA-1: 109075b223bc0c1e77754cf5db2df04ef861ff11 SHA-256: 6dc749426dbab491c9cfe152f77486326463918ce8350ebe75389e75b4fac520
156 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. Specific URLs and indicators for this sample are listed in the indicators section.

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://dugedepap.ru/123?utm_term=grade+3+math+multiplication+and+division+worksheets PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426815/normal_6032cc8ed4b3e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366958/normal_5fdb16d4d98e4.pdfIn PDF document text
    • http://datingdate.site/the_idiots_are_taking_over_bassjix8r.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4502464/normal_5fe830e9487e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471996/normal_601b9aff1b6cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4423732/normal_60465885247c4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450154/normal_5ffab956ca5df.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453551/normal_5fe903cab2a64.pdfIn PDF document text
    • http://urott-hu.com/age_of_war_flash_game_musicnwmlc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410954/normal_602a58274818e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462374/normal_5fd0da42b4e3c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4446015/normal_5ffe587275048.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://68fdcf0a-b1f0-4758-9edf-48d2be6d990b.filesusr.com/ugd/ac51ce_f713886cea5f4e7493ffff94cd0dc922.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d327c4c-fccc-4fb7-988d-ad0ceeaf6d2f/duladimepejepofu.pdfIn PDF document text
    • https://c3d762b3-5d50-4891-ab6d-43710edd2423.filesusr.com/ugd/3254bf_be1c94eca5ed4d6daf33b6a78d624667.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/18859b53-fe64-4975-a227-3e26d156fb69/software_development_life_cycle_timeline.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 1

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

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000eb3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3C 5608 bytes
SHA-256: d3f0aac2e5d38142e64b15dfb678d986d9a3fbff6f67ded0eee10ded843390af
font_01_sfnt_off0000fe36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE36 10892 bytes
SHA-256: 4ba3aa428204e5de4d26e8a1c1156aa9ca5ab8475756bec02300eaea7e98dca1
font_02_sfnt_off00012370.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12370 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

Open this report in the interactive analyzer, or submit your own file for analysis.