Malicious PDF — malware analysis report

Static analysis result for SHA-256 d59afe831e91c77b…

MALICIOUS

PDF

68.8 KB Created: 2020-11-20 20:52:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 7fa0791b5f3e0132f562f1a2c8f72845 SHA-1: 98336695a6c718c44c8632c7b8061f9b79cb7cd4 SHA-256: d59afe831e91c77b9e9762067b42b20460946e092c0439577b9de1829e27d62b
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-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.
  • 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://traffset.ru/123?utm_term=carnegie+learning+integrated+math+3+volume+2+answer+key PDF link annotation
    • https://gukepofefefika.weebly.com/uploads/1/3/1/4/131437977/bubafu_wunupikinov_xebipomuxulanu_fokuzi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369343/normal_5f87e269df4e3.pdfIn PDF document text
    • https://jikeberu.weebly.com/uploads/1/3/1/8/131857846/8346337.pdfIn PDF document text
    • https://finijuzado.weebly.com/uploads/1/3/4/4/134444754/9149764.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4482228/normal_5fb3f2f273495.pdfIn PDF document text
    • https://lififamofupuge.weebly.com/uploads/1/3/4/3/134317858/vorazixe_tetixejovora.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378623/normal_5f9c02ee5491d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367914/normal_5fa81390026fb.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/97c99564-28ad-440f-aafc-1457e373fa9a/programar_control_de_directv.pdfIn PDF document text
    • https://s3.amazonaws.com/susopuzupure/46361223429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/00fea03a-e8fe-4232-99f3-10326c52aac8/58248678042.pdfIn PDF document text
    • https://s3.amazonaws.com/gewisetug/10797308807.pdfIn PDF document text
    • https://s3.amazonaws.com/retisovojor/showbox_mod_apk_android_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/20241884-87e2-4c7e-9f8f-991e8a24b985/mazirepugulez.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 3

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_off0000cc17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC17 5756 bytes
SHA-256: 5efe312a3153567e5819196ad01e6e8925e6a89f6744cf3985dd9c5052c7203b
font_01_sfnt_off0000df9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF9D 11148 bytes
SHA-256: c11a00279eb0511124e7a37c370a25c02e4158e7e05b34d215f492ef0579897f

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