Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f2df723c51f0795…

MALICIOUS

PDF

61.7 KB Created: 2020-11-10 21:52:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 8d73aadb6a6d557b79e0da6c5edf7a1a SHA-1: 69021b74c12bc072bea3ea0c07cef45aa0d9ec78 SHA-256: 1f2df723c51f0795bc89564a8139140d85c2407ca9132c24a54500a4eb159175
186 Risk Score

Malware Insights

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

This PDF file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, many pointing to disposable hosting, suggesting a link farm designed to distribute malicious content or phish for information. The primary URL, trafffi.ru, is presented with a keyword related to games, likely as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 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.
  • 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://trafffi.ru/strik?keyword=crash+bandicoot+unblocked+games PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403804/normal_5f963e5e3a0ff.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478933/normal_5fa6b95c73cc1.pdfIn PDF document text
    • https://sivagodumojuji.weebly.com/uploads/1/3/4/2/134235915/de9f82554077f.pdfIn PDF document text
    • https://gunapozebufe.weebly.com/uploads/1/3/4/3/134316646/selilisejikanez_ruxuxiwogu_jofepov_gekowegul.pdfIn PDF document text
    • https://winapusumebut.weebly.com/uploads/1/3/4/6/134695108/zelilimipajira-zowukedi-pawetakumuf-kosuga.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481278/normal_5fa8ef76e2014.pdfIn PDF document text
    • https://serirufudo.weebly.com/uploads/1/3/4/7/134712976/5098377.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413455/normal_5f95ad5c1875f.pdfIn PDF document text
    • https://zigegawemofeza.weebly.com/uploads/1/3/1/4/131406932/5132354.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370285/normal_5f926a8219d4c.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/4b78e02fcdea11.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/divelikubapiwaj/l_urbanisme_au_maroc.pdfIn PDF document text
    • https://s3.amazonaws.com/zuxadol/zasavugebop.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_off0000b49a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB49A 5464 bytes
SHA-256: 19358fb7afef02f441e45c243906446b8b2d7755eeaa99314cbb9ffea3950fec
font_01_sfnt_off0000c6fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6FA 10344 bytes
SHA-256: 821b557d7024d9de8aabf0ba9fa3415e315f5a3776d744918954fc96e973c0e5

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