Malicious PDF — malware analysis report

Static analysis result for SHA-256 15fdd84a92834076…

MALICIOUS

PDF

70.7 KB Created: 2020-11-24 13:59:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 38ef4d6db8de831387971196970f0827 SHA-1: 2cd13e95ec9ed80f7b9a14851dd7edeac9dc1e3b SHA-256: 15fdd84a92834076458d533850584245a8f039a1a236392c5ffc1dcb10b26a05
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a significant number of external links, many hosted on disposable domains, suggesting a link farm or SEO manipulation tactic. The presence of embedded URLs and the heuristic 'PDF_SEO_LINK_FARM' strongly indicate that the primary function of this document is to redirect users to potentially harmful external sites.

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/strik?utm_term=the+tree+of+the+knowledge+of+good+and+evil+verse PDF link annotation
    • https://lowizozexide.weebly.com/uploads/1/3/0/7/130776176/3371310.pdfIn PDF document text
    • https://wumudirega.weebly.com/uploads/1/3/4/5/134515906/760813.pdfIn PDF document text
    • https://goxezojukaruvuk.weebly.com/uploads/1/3/4/0/134000107/afc89e4f73521fe.pdfIn PDF document text
    • https://nipokilalupa.weebly.com/uploads/1/3/4/4/134485501/2792656.pdfIn PDF document text
    • https://bipejazikapidim.weebly.com/uploads/1/3/4/5/134529651/d68d6a4477c578.pdfIn PDF document text
    • https://nowusunomotir.weebly.com/uploads/1/3/4/3/134314498/suworefewuza.pdfIn PDF document text
    • https://botubadixebom.weebly.com/uploads/1/3/1/4/131407995/4979240.pdfIn PDF document text
    • https://vopevejefed.weebly.com/uploads/1/3/1/6/131606133/6649f5.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/a792092b-e32b-49e2-b6eb-f583db02e79d/jatamoxefarewefuf.pdfIn PDF document text
    • https://s3.amazonaws.com/divexikav/showbox_.apk_windows.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxime/jazifatigipumarobis.pdfIn PDF document text
    • https://s3.amazonaws.com/peveziwoguxuzam/idealist_theory_of_international_relations.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8C5 5332 bytes
SHA-256: 9a4b9d95017df7ec0d29802620c1bf621b762fcda4ff9173ba51f1d1c983eafc
font_01_sfnt_off0000eafc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAFC 10112 bytes
SHA-256: d01743fd33970d09289651f2895ca06885c7f07c16d41c3244fc58110347f9e8

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