Malicious PDF — malware analysis report

Static analysis result for SHA-256 29d8c2205b47ef59…

MALICIOUS

PDF

73.3 KB Created: 2020-11-21 23:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0fcac74726df16f6761648ddb8a269ea SHA-1: 66c5dfe90bc7abed9179ca50d41f7def6d2bb6df SHA-256: 29d8c2205b47ef592062838ad8683ece7c19eab49247a1aea2f2da38c0a5f670
214 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 as malicious by multiple heuristics and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of embedded links, with at least one pointing to known malicious redirector infrastructure. The document body is heavily obfuscated and appears to be junk data, suggesting the primary purpose is to host these malicious links.

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://traffmen.ru/123?utm_term=how+many+playing+cards+in+a+deck+including+jokers In PDF document text
    • https://cdn-cms.f-static.net/uploads/4413842/normal_5fb41ce52ff6c.pdfIn PDF document text
    • https://bozalugim.weebly.com/uploads/1/3/4/3/134343660/zoluwekuvegaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367013/normal_5f873f4285f43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387244/normal_5fa48d4f89b10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_5f93a26e3c371.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5fb97f88ba2eb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369508/normal_5f9656f6deb5c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468537/normal_5fb79d4b5a2b8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376874/normal_5f8ab2c6e03c7.pdfIn PDF document text
    • https://xazopitanajemav.weebly.com/uploads/1/3/4/7/134714933/8923272.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411922/normal_5fa513c26e494.pdfIn PDF document text
    • https://boguvetasitob.weebly.com/uploads/1/3/1/3/131380850/metunazarajo_gurelebufekizot_gasagut.pdfIn PDF document text
    • https://kumenesasewoton.weebly.com/uploads/1/3/4/7/134773405/06ee231e.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/davawina/camp_chef_tundra_3x_burner_stove.pdfIn PDF document text
    • https://s3.amazonaws.com/zetituri/folding_work_table_scam.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ca64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA64 5688 bytes
SHA-256: d25660e1a86971f9e534db1f4ed524052ef7a9b86f42e4d50825f19debaf7a5d
font_01_sfnt_off0000ddbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDBD 10292 bytes
SHA-256: 7d004a2631d88bbb50b93158ca5fdc4c88675a2b2b8d2b7b22cb09b8f3392f21
font_02_sfnt_off000100ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100EE 16752 bytes
SHA-256: 9074b2d4d7e33e17c3512ea796414bdeebf97ff9d98fef264a1d5fd7a15afeb6

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