Malicious PDF — malware analysis report

Static analysis result for SHA-256 e628ac9e081e68e5…

MALICIOUS

PDF

99.6 KB Created: 2020-11-18 07:40:33 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 2f497dedba00c7834ddaba8cbd66468e SHA-1: 67666e787e74480efa117ec98920268b2bf3c19f SHA-256: e628ac9e081e68e52e2a741f6b0ef57287f378f7208c90945f5a8459c1630989
164 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains a large number of external links, with one prominent URL pointing to a suspicious domain. The presence of a 'download button' heuristic and ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a malicious intent to trick users into downloading further malicious content. The PDF_SEO_LINK_FARM heuristic indicates a deliberate attempt to create a large number of links, likely for SEO manipulation or to host multiple malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://traffnew.ru/strik?utm_term=juegos+para+ppsspp+android+gratis PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4393348/normal_5faaed4e1d5af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5f893cc794306.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372072/normal_5f8b740297b39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_5fb3f2ad4bf33.pdfIn PDF document text
    • https://bakuwosir.weebly.com/uploads/1/3/0/8/130874569/6092007.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a9fc4c-d48e-4923-8360-4d18bca6487e/96783272819.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/dobanati.pdfIn PDF document text
    • https://s3.amazonaws.com/jolituzoji/puxetikopor.pdfIn PDF document text
    • https://s3.amazonaws.com/xanebavifamopez/tuwobuvek.pdfIn PDF document text
    • https://s3.amazonaws.com/tipakalif/78269429089.pdfIn PDF document text
    • https://s3.amazonaws.com/nowokil/47579673528.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0a60106-cd8b-4643-8a24-c76dd29c7bcc/batman_arkham_city_talia.pdfIn PDF document text
    • https://s3.amazonaws.com/mamibis/88437859216.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/what_is_expectancy_value_theory_in_education.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7F 5084 bytes
SHA-256: 18a30f129b159c561e5f8b0017e4cbb3e4e356f2d667c6261b97514123f89ac4
font_01_sfnt_off000150cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x150CD 2092 bytes
SHA-256: 9fcfd2b2c12c9d480c0beec3ee39f05b9e518edc5177a7a5fcc68dff0371f8a2
font_02_sfnt_off00015a6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A6E 11340 bytes
SHA-256: a2286878aea1ed17f635c0b704f061a1954a0f40da2058e3704d99384dde80ce

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