Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3aaeda8c36db297…

MALICIOUS

PDF

89.3 KB Created: 2021-01-24 01:46:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 7c257ee4ed06bcb85653a74a32da9226 SHA-1: 20bb7a2aba4f112b1739b5e8169007cb7d8ccbd7 SHA-256: c3aaeda8c36db29792fc16f2de0aaffa4e20086fc36913c3da62a0228ffba09f
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs, including one pointing to 'traffking.ru', suggesting it is designed to redirect users to potentially harmful websites. The presence of multiple disposable hosting links further indicates a phishing or malicious distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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 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.
  • 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/aws?utm_term=facebook+ads+template+size PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4367296/normal_5fe9efdd1a991.pdfIn PDF document text
    • https://site-1256593.mozfiles.com/files/1256593/biological_anthropology_craig_stanford.pdfIn PDF document text
    • http://dazinifuxevoji.22web.org/30919763792.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388156/normal_600c276926960.pdfIn PDF document text
    • https://jotitotibewava.weebly.com/uploads/1/3/1/3/131383271/4114431.pdfIn PDF document text
    • https://xutafutixon.weebly.com/uploads/1/3/4/5/134576274/8641aee3527aba6.pdfIn PDF document text
    • https://raxuremaxu.weebly.com/uploads/1/3/5/3/135350699/1309900.pdfIn PDF document text
    • https://site-1166656.mozfiles.com/files/1166656/color_picker_extension_vscode.pdfIn PDF document text
    • https://tabogivazosepa.weebly.com/uploads/1/3/1/8/131871767/tuxepujopa.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379233/normal_5feff11bb2639.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/kieo1D3/84593094471.pdfIn PDF document text
    • https://lumovomudin.weebly.com/uploads/1/3/4/7/134704265/d596947b7954.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4498997/normal_6006b0fe5e3aa.pdfIn PDF document text
    • https://cdn.sqhk.co/rureroso/Wjigeii/addons_for_minecraft_app_for_pc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nuvebuxuloruvux.epizy.com/android_auto_rotate_video.pdfIn PDF document text
    • http://darozux.epizy.com/13098026209.pdfIn PDF document text
    • http://jopimuriwunewok.epizy.com/nazafakevetejak.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_off0001204c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1204C 5332 bytes
SHA-256: 229052bec0f19672e93a5eda3bef9243959fb0ff3c39591b65ff5774907e91ab
font_01_sfnt_off00013261.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13261 11028 bytes
SHA-256: fbf5d19a456268a2fd997ab416a99e665d0e1bff182e837f154171c9fd761afe

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