Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d952fcc4666aca0…

MALICIOUS

PDF

59.3 KB Created: 2020-12-21 22:45:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2ca645dc7c3235a8fd1da3ed401a90ed SHA-1: 7abef892b9ff206efb333506266e3a8d1e9935a7 SHA-256: 0d952fcc4666aca036ee0a0fdb4cb281c09d712a2c8adb71e5da1e3b4c90d513
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF document contains a large number of external links, identified as a link farm, with the primary URL being traffking.ru. This heuristic, combined with ClamAV detection and ML classification, strongly suggests malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure indicates a potential spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://traffking.ru/strik?utm_term=knife+images+hd+download PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4491723/normal_5fc9da81328da.pdfIn PDF document text
    • https://zeteparikimifol.weebly.com/uploads/1/3/1/6/131637109/ditusodo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371244/normal_5f959a3d37895.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377706/normal_5fb8d029a13f9.pdfIn PDF document text
    • https://xonuguzuv.weebly.com/uploads/1/3/1/3/131382030/b43f30.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385880/normal_5f99d9fa97282.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450509/normal_5fa8b60564634.pdfIn PDF document text
    • https://galixasuja.weebly.com/uploads/1/3/4/5/134518214/15f56c5.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/2579fc98-b01d-4128-9f7b-7cfdb6d68e9b/lewozolufeso.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c1dc0b6b03258f4e1bb4/t/5fd670acab1a676c72906ece/1607889069329/absceso_hepatico_articulo_de_revision.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fdc7a3b0a190b16b315946c/t/5fdcf3df8403c015c7baf216/1608315872578/18701577912.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_off0000ac89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC89 5284 bytes
SHA-256: 02cf6b3df2ccd6cab80946402ebd34ea8750e25cf83952cac6473f4bbfe97eb1
font_01_sfnt_off0000be7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7B 10080 bytes
SHA-256: bf2a8cde71960a40a5ca180f52ca5501f883b72f70aa8e381d33e1371e64fa4f

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