Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e74c42d60e230e4…

MALICIOUS

PDF

61.1 KB Created: 2020-12-24 09:28:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 421c4b30b1c704d79b428dd9ee6c4dea SHA-1: 9b706c1ecab664a96d7955d87d08de22f09ff759 SHA-256: 0e74c42d60e230e4f1da9f0a2e18273fae4345e6665f126953de471e3fb173e4
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous embedded URLs, including one pointing to 'traffset.ru', which is likely used to redirect the user to a malicious site. The presence of multiple disposable domains and link farms suggests a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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
  • 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://traffset.ru/strik?utm_term=teacher+scary+kidnapper+simulator+level+4 PDF link annotation
    • https://mixasokuxorizu.weebly.com/uploads/1/3/4/7/134742222/1401389b1.pdfIn PDF document text
    • https://medizagokitoni.weebly.com/uploads/1/3/2/3/132303310/8f57fed01987.pdfIn PDF document text
    • https://gejimedetudumi.weebly.com/uploads/1/3/3/9/133997730/repawedofuzot.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386618/normal_5f93b7b94ab30.pdfIn PDF document text
    • https://tubumafipe.weebly.com/uploads/1/3/4/4/134458357/3371936.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4458145/normal_5fcf88831b343.pdfIn PDF document text
    • https://larojebuwovu.weebly.com/uploads/1/3/1/3/131382373/murovubabile-bufuv-ruwexopifimizo.pdfIn PDF document text
    • https://tidosivapozagul.weebly.com/uploads/1/3/4/3/134390518/kamepaxuwujiz.pdfIn PDF document text
    • https://fujubonutebi.weebly.com/uploads/1/3/4/2/134266124/nulepoxa-sojugevajusivek.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8a8ee28d-999b-454e-a09f-56bb78f90d64/45498377918.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49db2005-553f-4d22-9a8b-55af4da70eb7/sononopuj.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a79a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA79A 5460 bytes
SHA-256: 66b1f9dc75c4631afb4a69c96b978ddb4ac4ae187960e22505a18a27f64b754b
font_01_sfnt_off0000ba06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA06 9140 bytes
SHA-256: f80771ef3d01701cfd83d37b70660381c60a4bf8271555c606c731cdacf07def
font_02_sfnt_off0000d950.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD950 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c