Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0acd2d62c7563f6…

MALICIOUS

PDF

72.0 KB Created: 2020-12-31 06:51:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 71256660d950c91f1416271e17748c88 SHA-1: 6890a929904711ea5c94d39e6cf66a0a00f809c4 SHA-256: f0acd2d62c7563f6eb0673687ef9b995866a1ae9e12fa951bc52ae58817f8549
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file contains a significant number of external links, identified by the PDF_SEO_LINK_FARM heuristic, pointing to various domains. One prominent URL is trafftec.ru, which is likely part of a phishing or SEO spam campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as Pdf.Phishing.Trojan. No scripts were extracted, but the structure suggests a malicious document designed to redirect users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://trafftec.ru/123?utm_term=god+of+war+haze+weave+farming PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4449992/normal_5fdd332f3306e.pdfIn PDF document text
    • https://gepavemu.weebly.com/uploads/1/3/4/8/134861499/fowibutozatimofoj.pdfIn PDF document text
    • https://nikokabiliru.weebly.com/uploads/1/3/1/4/131409463/begigud.pdfIn PDF document text
    • https://dinufipaxa.weebly.com/uploads/1/3/4/4/134440308/bumadubagus.pdfIn PDF document text
    • https://lagukekejase.weebly.com/uploads/1/3/0/8/130815031/nulini.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377936/normal_5f9ae3996226d.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/sisaxu/ammonia_refrigeration_cycle.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/wupuwafot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d8077d9-3d45-4ca3-987a-f626dbc45169/25180253651.pdfIn PDF document text
    • https://s3.amazonaws.com/takebemanijewok/rosefativevotudodo.pdfIn PDF document text
    • https://s3.amazonaws.com/sewamos/thyroid_gland_histology_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/kipajudir.pdfIn PDF document text
    • https://s3.amazonaws.com/tesodagiwor/62541693240.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_off0000ded0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDED0 5344 bytes
SHA-256: 401576eb542cbec289632eb9d5090727a84e0d034110a3d898f0c8ba6ac26ff1
font_01_sfnt_off0000f0fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0FD 10080 bytes
SHA-256: 4ea3e0c55aaede11a4186641a10cb2c61240ca84b6e037933d61b163076b4dd2

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