Malicious PDF — malware analysis report

Static analysis result for SHA-256 3db0379f88dafa9b…

MALICIOUS

PDF

76.0 KB Created: 2021-01-02 22:11:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 3bee463e9361044e438aba3270b39133 SHA-1: 395c2f869f4f8962f8fdc23eee8ba020d0216d3e SHA-256: 3db0379f88dafa9b0ba9fc612e233d4f0f2608bd08aafe89248dfdbc6e782ae8
244 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, and it contains numerous links to external websites. One critical heuristic identified a link to known malicious redirector infrastructure at 'traffking.ru'. The document body, though heavily obfuscated, appears to be a lure related to credit reports, aligning with phishing or malware distribution tactics. The presence of many external links suggests an attempt to direct the user to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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.
  • 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=free+credit+report+south+africa+compuscan In PDF document text
    • https://cdn-cms.f-static.net/uploads/4370284/normal_5f89f48900f9c.pdfIn PDF document text
    • https://rifewageza.weebly.com/uploads/1/3/5/3/135349229/babefefumogi.pdfIn PDF document text
    • https://zerexima.weebly.com/uploads/1/3/4/6/134643072/vuduxuzi.pdfIn PDF document text
    • https://nivujetomut.weebly.com/uploads/1/3/4/7/134753784/45143.pdfIn PDF document text
    • https://cdn.sqhk.co/monasomeb/icnicsA/teddi_mellencamp_age_husband.pdfIn PDF document text
    • https://cdn.sqhk.co/nibidawe/UoeDjeq/51825445210.pdfIn PDF document text
    • https://fidovasunub.weebly.com/uploads/1/3/0/8/130815093/lubesarifo.pdfIn PDF document text
    • https://xuzutewoduka.weebly.com/uploads/1/3/4/3/134364923/besasoga_suvite_ganigifanapuxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471514/normal_5fa93a7335f68.pdfIn PDF document text
    • https://dirasikazeta.weebly.com/uploads/1/3/1/3/131379856/fee913e9c4099.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/7cd764ada1.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/30f5ae48-c2a3-4998-b791-51c7c2b3637e/the_heist_2.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c2c51fbd-b4d5-49e8-af70-075eb5f0f0ea/nra_guide_to_firearms_assembly.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/668f2bb8-be9e-4fd8-b7c1-548c42e4989b/70814596641.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77b1d57a-2f7e-4b8a-b734-b1d9fef01e8a/90688105563.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4d625b7-0f01-4cc2-8942-fcae6d2b429a/home_planning_guide_pakistan.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c468864c-f7d0-4f98-818b-2706389ec479/26795299197.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30f6b98b-7635-4aa0-9df5-6939bbd41bec/62726710854.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_off0000e808.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE808 5316 bytes
SHA-256: 8e1d52335dbe479a60cf71624f75f46a53c946b764a2e57fa6bf6b979f028598
font_01_sfnt_off0000f9fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9FB 11716 bytes
SHA-256: 75b6e5314936189ed304e68e48cdf6629e412e5a5e632e39e16e08bc466f23ee