Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ca5d6eb0ecc8478…

MALICIOUS

PDF

85.3 KB Created: 2021-04-21 23:58:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcc77d8edff32c58786c1a5206647174 SHA-1: 76982fc2117e9fe524eb02506b616e1f561481a2 SHA-256: 1ca5d6eb0ecc8478be9b77eebd69bb53c842f039192d0465b6057e8b948d1df8
126 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains numerous embedded URLs, suggesting it functions as a link farm or phishing lure, redirecting users to potentially harmful sites. The presence of external URIs and the classification as a 'Phishing.Trojan' strongly support its use in phishing campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://druttle.ru/strik?utm_term=a+voyage+long+and+strange+answers
    • https://zomereke.weebly.com/uploads/1/3/5/3/135397468/6ed46f753cc.pdf
    • https://pirulilepeno.weebly.com/uploads/1/3/4/0/134040853/molemogapudad.pdf
    • https://tovibimatajo.weebly.com/uploads/1/3/5/9/135963052/4558585.pdf
    • https://monaxakapivelor.weebly.com/uploads/1/3/1/1/131164425/xojorizaku.pdf
    • https://static.s123-cdn-static.com/uploads/4491965/normal_5fc8dd6230e15.pdf
    • https://liberiloro.weebly.com/uploads/1/3/4/5/134589576/xitofid-nefewu-dojotu.pdf
    • https://rudiduwusoxu.weebly.com/uploads/1/3/4/4/134445317/podolamizaf-maduv.pdf
    • https://static.s123-cdn-static.com/uploads/4366969/normal_5ff16fe8504b3.pdf
    • https://cdn-cms.f-static.net/uploads/4446633/normal_6021d32968fbd.pdf
    • https://cdn-cms.f-static.net/uploads/4370525/normal_5fd5f5e81ced1.pdf
    • https://vebexedupatad.weebly.com/uploads/1/3/2/7/132740253/a9404cfea5c.pdf
    • http://vclean-sale.shop/coliform_mpn_in_drinking_wateru61iw.pdf
    • https://cdn-cms.f-static.net/uploads/4458829/normal_6047f65b90599.pdf
    • https://cdn-cms.f-static.net/uploads/4384154/normal_5fd92f66c4db4.pdf
    • http://usacreditmonitoring.info/is_itil_certification_difficult0xkfo.pdf
    • https://juvezunadu.weebly.com/uploads/1/3/5/3/135306862/pesexenuselofap_puvona_kokazixaz_domekedut.pdf
    • https://cdn-cms.f-static.net/uploads/4485313/normal_604685a99cd99.pdf
    • http://efarbok.xyz/bobuvec79u7.pdf
    • https://static.s123-cdn-static.com/uploads/4488316/normal_5ff0245680073.pdf
    • https://static.s123-cdn-static.com/uploads/4448346/normal_5ff58d411907e.pdf
    • http://doucheapp.xyz/37225967928wdol7.pdf
    • https://cdn-cms.f-static.net/uploads/4474206/normal_600f0d82e461e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://s3.amazonaws.com/dobesogum/levevovisevelojalutuw.pdf
    • https://s3.amazonaws.com/kujesulad/ash_guidelines_for_itp.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001032f.bin
33b9e1deec178b8718102073793888f8f55ad3c226bda4cb94450b57ad0f8ab0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1032F 4976 bytes
font_01_sfnt_off0001143b.bin
5ec31251ce2b955ac952767341708ed79815d9360d27baf356750eee51d89cac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 11116 bytes
font_02_sfnt_off0001398c.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1398C 4324 bytes

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