Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e34cabad7142dd4…

MALICIOUS

PDF

60.0 KB Created: 2020-11-24 03:20:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: ac1bf8f659c26a43ee95de23fba0cfa2 SHA-1: 30b1d563e36d826c4fc7f6c1161b840d43f8c9bf SHA-256: 3e34cabad7142dd4a2656ff5fbec324da577a3131fa85661a104895f57212bca
214 Risk Score

Malware Insights

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

The PDF file contains a high number of embedded links, with at least two heuristics indicating a link farm and a malicious redirector. One of the URLs points to a known malicious redirector, and the file is flagged by ClamAV as a phishing trojan. The presence of embedded URLs and the nature of the heuristics suggest an attempt to lure users to malicious content, likely as part of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=introductory+applied+quantum+and+sta In PDF document text
    • https://cdn-cms.f-static.net/uploads/4470399/normal_5fa4032f073f8.pdfIn PDF document text
    • https://wejibuxod.weebly.com/uploads/1/3/0/7/130740202/pusevojekenalus.pdfIn PDF document text
    • https://popilezofale.weebly.com/uploads/1/3/1/1/131164236/680213.pdfIn PDF document text
    • https://kadogejajufa.weebly.com/uploads/1/3/4/7/134717900/kurodekerolez-jitavibitekobi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_5fa426fcc7863.pdfIn PDF document text
    • https://jobubati.weebly.com/uploads/1/3/1/4/131453688/jetose.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/zetare/22688922797.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/81283914439.pdfIn PDF document text
    • https://s3.amazonaws.com/ligole/1v1.lol_unblocked_games_76.pdfIn PDF document text
    • https://s3.amazonaws.com/zerepuzuze/daft_punk_random_access_memories_album_zip.pdfIn PDF document text
    • https://s3.amazonaws.com/suzixegazunow/coliform_urine_infection_symptoms.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_off0000aebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEBF 5384 bytes
SHA-256: d6b8155b0a84b4517ca912af659ffc01bfea8cd049fcc134159d1cefdc36e815
font_01_sfnt_off0000c0ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC0FF 10176 bytes
SHA-256: 64b919c4714813910354b7453b10c1908424c6ec169d3619fc40583270fdfdc7

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