Malicious PDF — malware analysis report

Static analysis result for SHA-256 906c171f2c253171…

MALICIOUS

PDF

60.5 KB Created: 2020-12-20 17:54:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: f06a793e55905f0a3b4d2340716538ec SHA-1: 969480b22a46018e23df058f842275f11b3fe3d0 SHA-256: 906c171f2c253171d1e95c03965e06b818dde2c0386a0e424842866a40e53f77
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 by multiple heuristics as malicious, including a critical finding for linking to known malicious redirector infrastructure. The document contains a large number of embedded URLs, many of which point to PDF files hosted on various platforms, suggesting a link farm or SEO manipulation tactic. The ClamAV detection and ML classifier further support its malicious nature, indicating it is likely a phishing or trojan distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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.
  • 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/strik?utm_term=olin+ross+sound+system+or860 In PDF document text
    • https://xijapesulole.weebly.com/uploads/1/3/4/5/134588017/64d0bf8.pdfIn PDF document text
    • https://xisegebimir.weebly.com/uploads/1/3/4/3/134340076/221c283a09c17.pdfIn PDF document text
    • https://sogovowezop.weebly.com/uploads/1/3/4/3/134324678/vesakaroxunexuro.pdfIn PDF document text
    • https://segakimorepej.weebly.com/uploads/1/3/0/7/130738797/vetazet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420600/normal_5fbb51fbe09f2.pdfIn PDF document text
    • https://vapipokolodux.weebly.com/uploads/1/3/4/3/134307816/4744853.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453734/normal_5fa1e4a93b83e.pdfIn PDF document text
    • https://zofifonanofanap.weebly.com/uploads/1/3/4/8/134876640/8748309.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/959c3ff8-47ce-48fa-8efb-2973c954b601/howard_high_school_atlanta_georgia.pdfIn PDF document text
    • https://s3.amazonaws.com/tofizo/the_giver_vocabulary_1-6.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/dazalimisubaliziguwuvipu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdeb274fbf4ee0481da8a5f/t/5fdf2efa15a11837d0b51ffa/1608462075377/mogujurixujezetanojuwifaz.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/alchemist_ro_m_homunculus_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/widiku/56281109828.pdfIn PDF document text
    • https://s3.amazonaws.com/wewuxuviwar/bsf_recruitment_2019_notification.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc65581a13a450bab197ba5/t/5fc6f8a73ac9c763f4cb315a/1606875303536/sharpening_stone_set.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_off0000afcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFCC 5380 bytes
SHA-256: 8b4b9ceeeae4260f18a216376c47cf6d66efc23c1b7ff62320c3b3c1768114a4
font_01_sfnt_off0000c205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC205 10324 bytes
SHA-256: 27201b4f7d4a4d385a1ab30393147c945b7044fd78ff5efef9a8bbbb316b0023

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