Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2459dc662114588…

MALICIOUS

PDF

70.0 KB Created: 2020-11-18 20:55:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 7c7ecd3695fb6b424f67df8ab90bf496 SHA-1: 8213507bffdf10e21d3f268d9f29ae3c578ce1be SHA-256: b2459dc662114588b1cd2b1553f231411748c660e62bf250791a231ece28d9b6
156 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, identified as a PDF link farm, suggesting a malicious intent to redirect users to potentially harmful websites. ClamAV detection and ML classification further support its malicious nature. While no scripts were explicitly extracted, the presence of embedded URLs and the link farm heuristic indicate a phishing or redirection attack pattern.

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://traffnew.ru/strik?utm_term=dear+woman+michael+reid+quotes PDF link annotation
    • https://nuzimalufugi.weebly.com/uploads/1/3/4/7/134705392/8647812.pdfIn PDF document text
    • https://dapamokosow.weebly.com/uploads/1/3/4/3/134337633/senejelibeb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377095/normal_5f9df3f429ea6.pdfIn PDF document text
    • https://zusaneji.weebly.com/uploads/1/3/0/8/130813769/768418.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401555/normal_5f9a024e57015.pdfIn PDF document text
    • https://zatajiwivovib.weebly.com/uploads/1/3/4/5/134529671/lironalirabuwux.pdfIn PDF document text
    • https://tenigirexono.weebly.com/uploads/1/3/4/6/134645883/5da1ed6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383340/normal_5fa9b8f3d1758.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/28fe8a00-4714-423e-9495-123a4c7b461f/82586713403.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/589360bb-e562-4d72-b1cd-e5d63fafbb50/.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edfee37-04df-487a-90b5-0f66146979be/95231329550.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f167a5e8-b713-40c0-92c8-62e8eab9bdd0/xabut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3f4f6330-236b-4d56-ba8c-7f6a77dc2b1b/fll_core_values_2019.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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
stream_004_off0000ed8c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xED8C 18600 bytes
SHA-256: e5ac1adf95e5cb6d7849534c4fb15c9cc9cf69e34cc7a355a6ab3fa3817b722b
font_00_sfnt_off0000b6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB6FA 5396 bytes
SHA-256: 82bf3df757bc007fb959ad78dec6e4e9044b2acf875847ae7f4ea37b23c6a121
font_01_sfnt_off0000c93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC93B 10640 bytes
SHA-256: d875756133683b163370db1ceca91c58482f8bcad90fb9b1fc43f076f33b3ff7

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