Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2ce70ae69d43cbc…

MALICIOUS

PDF

86.2 KB Created: 2020-11-13 17:44:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 7c53c0931a2fe6b0969ee94c77fc426e SHA-1: 2abf767cd86ee6742bdc10507069fd8382d7b856 SHA-256: d2ce70ae69d43cbc694f27022810fe8d409c357b301d6b4eb6344db27c1af906
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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/123?utm_term=zero+order+kinetics+alcohol PDF link annotation
    • https://roderisagewap.weebly.com/uploads/1/3/4/5/134507489/7048593.pdfIn PDF document text
    • https://liletizotefos.weebly.com/uploads/1/3/4/2/134234842/vekunonorepuk.pdfIn PDF document text
    • https://pitamiled.weebly.com/uploads/1/3/4/0/134098016/cdeca8bd7e6.pdfIn PDF document text
    • https://viwawisigox.weebly.com/uploads/1/3/4/3/134342504/lozadigo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413017/normal_5f95004e8f904.pdfIn PDF document text
    • https://witudaki.weebly.com/uploads/1/3/4/3/134332653/acb4f2ea635224.pdfIn PDF document text
    • https://norumevi.weebly.com/uploads/1/3/0/9/130969469/7562278.pdfIn PDF document text
    • https://folemazilepi.weebly.com/uploads/1/3/1/1/131164248/begijof_puwefoluxib_rinutolij.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/jinabisura/45125745012.pdfIn PDF document text
    • https://s3.amazonaws.com/toliwudalamem/burrito_bison_unblocked_games.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_off000115fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115FB 5048 bytes
SHA-256: 10758c1e324f7fc263670d9ea02cad3aba9a2cd0158b1fc00d12a459f0aebbe1
font_01_sfnt_off00012722.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12722 10952 bytes
SHA-256: cb366d55c362c92d0995e98ec428ec241e82ff67f004b9e4aa32a5798030c341

Open this report in the interactive analyzer, or submit your own file for analysis.