Malicious PDF — malware analysis report

Static analysis result for SHA-256 11e011019fc4d223…

MALICIOUS

PDF

70.6 KB Created: 2020-12-28 09:04:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: caeb64cb783dce6a8d47753936699fc8 SHA-1: 45039e1f4e9ef33b4672e0a0839ec5a4ec01c4e2 SHA-256: 11e011019fc4d223933592095b705482d9cae8bdeef225dbb7faf4179cc0049b
186 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 0.9997

Heuristics 6

  • 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.
  • 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.
  • 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://traffking.ru/aws?utm_term=appscan+standard+user+guide PDF link annotation
    • https://cdn.sqhk.co/tubafejog/gehijft/54158770101.pdfIn PDF document text
    • https://cdn.sqhk.co/pufowuvikij/VjyJM4d/tokyo_ghoul_dark_war_code_generator.pdfIn PDF document text
    • https://tinalolovini.weebly.com/uploads/1/3/4/3/134371967/2585839.pdfIn PDF document text
    • https://garusase.weebly.com/uploads/1/3/4/6/134634063/jopofego.pdfIn PDF document text
    • https://panidulupeju.weebly.com/uploads/1/3/0/9/130969186/2911471.pdfIn PDF document text
    • https://cdn.sqhk.co/xoluxuroku/hfxahci/lucky_block_for_minecraft_1._12._2.pdfIn PDF document text
    • https://gojafone.weebly.com/uploads/1/3/4/8/134891791/wubidisejoligidorili.pdfIn PDF document text
    • https://sufudoni.weebly.com/uploads/1/3/4/8/134853368/3514532.pdfIn PDF document text
    • https://tadiselugel.weebly.com/uploads/1/3/4/5/134589133/abbc64347a.pdfIn PDF document text
    • https://cdn.sqhk.co/kapidibewomu/Nge5Jnf/air_traffic_control_system_failure.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/66f01fe1-a1d0-4356-9fc7-08bbbf16352e/19351716458.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/38518fc7-7664-46d0-bda6-8b9f79d9a98e/40239963851.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_off0000d8df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8DF 5196 bytes
SHA-256: 5fb1945e926a4ae7c9602c42243b7a65ebd7afbc4eca474a6193ab3f344cd62b
font_01_sfnt_off0000ea9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA9A 10412 bytes
SHA-256: ce5a17b7862a918068358ea134b9aab809cf9ea7bb48422a45e334315d3a590d

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