Malicious PDF — malware analysis report

Static analysis result for SHA-256 545605b0a2a19571…

MALICIOUS

PDF

65.0 KB Created: 2020-12-21 03:42:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 506251384dbac87a1e5430fc491bf07d SHA-1: 96700c6e3f5289fbd88b5a27ac5a934872fce25a SHA-256: 545605b0a2a19571cfe4c9feb7e86dd8bd2c04547aac329ee9161676bc0de027
244 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file is identified as malicious by multiple heuristics and a machine learning classifier, specifically flagged as a phishing trojan. It contains a link farm with numerous URLs pointing to disposable hosting, designed to redirect users to malicious sites like 'traffking.ru'. The document's content, though obfuscated, suggests a lure related to 'Tai chi moves step by step pdf', indicating a social engineering attempt to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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
  • 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.
  • 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.
  • 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=tai+chi+moves+step+by+step+pdf In PDF document text
    • https://kiwusaxanasatip.weebly.com/uploads/1/3/0/7/130738973/xaxavere_bosodevewuru.pdfIn PDF document text
    • https://mutoxikaxinabab.weebly.com/uploads/1/3/4/8/134886861/bakofi.pdfIn PDF document text
    • https://wevinavuligi.weebly.com/uploads/1/3/4/5/134505150/6537660.pdfIn PDF document text
    • https://sanawovixib.weebly.com/uploads/1/3/4/6/134653903/4e5d2d6dd9fb93d.pdfIn PDF document text
    • https://saxesejidor.weebly.com/uploads/1/3/4/6/134694827/zoful.pdfIn PDF document text
    • https://sunajekivogemaz.weebly.com/uploads/1/3/4/8/134895881/xagopetivi.pdfIn PDF document text
    • https://toroborelap.weebly.com/uploads/1/3/4/8/134867907/181dc73c986aa4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fde968fd548586ddd28100e/t/5fde9b58d85ca2644205e65e/1608424281019/27506108089.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fcebeb2b44223045ec9dc74/t/5fd0212f48ae4d1218f634a6/1607475503523/crossroads_ford_fuquay_nc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3762352d-32a4-4df0-8969-2daa158016de/gold_gym_inversion_system.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_off0000c29a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC29A 5516 bytes
SHA-256: 39d5c5b03d2ea3893afbc5571dea21e6df71dd38b6be796091132f1ab16aff1a
font_01_sfnt_off0000d542.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD542 10196 bytes
SHA-256: 4e99e3e8fea2e82069989681b1995be155f0329470ecfd555a2382501bf1d52e

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