Malicious PDF — malware analysis report

Static analysis result for SHA-256 c006f6bb50539014…

MALICIOUS

PDF

76.3 KB Created: 2020-11-14 09:39:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 451683d4313a98360914b2b811d4f600 SHA-1: 11c47063f265ed0902391b9c3230170530486118 SHA-256: c006f6bb505390140879d8f3408ede309b4c6373b5e0058be840eaaee335ca54
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

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://trafffi.ru/123?utm_term=code+purple+hospital+labor+and+delivery PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4388814/normal_5f9a55a68c7b4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422643/normal_5f9d322e3b681.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380869/normal_5f928ef224687.pdfIn PDF document text
    • https://pujatimosu.weebly.com/uploads/1/3/2/6/132681823/1392043.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469638/normal_5faea9f2ef487.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383321/normal_5f8baf1982c72.pdfIn PDF document text
    • https://pevugubak.weebly.com/uploads/1/3/2/7/132740457/7271212.pdfIn PDF document text
    • https://fatuvubexu.weebly.com/uploads/1/3/4/4/134496757/6469768.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383132/normal_5f987445431bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5f9fe1301631c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5fa21c27800fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5f87c75823344.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/kawotexulozax/free_sims_mobile_money_hack_2019.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/smaller_size_mac.pdfIn PDF document text
    • https://s3.amazonaws.com/befarekogol/all_american_pressure_cooker_no._7_manual.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE88 5252 bytes
SHA-256: afab2db02638df86795e19427c4c277a8fc2e11da08ea4b20bb0338f4f8c815e
font_01_sfnt_off00010055.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10055 10692 bytes
SHA-256: e306adaf3f1422ba2ccadf0d8cc08a579592cae28c70779d1921207db0bf9eb6

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