Malicious PDF — malware analysis report

Static analysis result for SHA-256 14e5d17ba7554522…

MALICIOUS

PDF

94.3 KB Created: 2021-05-22 20:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 351155d5bdf9f3fd8f0b1984ebc5edc9 SHA-1: 4157c473ef2da1ca5a910ca3880c6bf08991b3b9 SHA-256: 14e5d17ba75545222f99d599abce445d740c98340dde2e5cbd407ea2311603af
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with the primary URL pointing to a suspicious domain. The ClamAV detection and ML classifier strongly indicate maliciousness, specifically a phishing or trojan threat. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic suggest the document is designed to redirect users to potentially harmful content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • 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://seumenha.ru/strik?utm_term=ecuaciones+lineales+con+una+incognita+con+fracciones+ejemplos PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4492245/normal_5fe3bf1ae2eef.pdfIn PDF document text
    • https://telazavax.weebly.com/uploads/1/3/4/7/134729689/geponixidopabupepavi.pdfIn PDF document text
    • https://xewulatejema.weebly.com/uploads/1/3/5/3/135345986/letakip_lerolejuku_zusivaxexuw_jemamexib.pdfIn PDF document text
    • https://semuzotefol.weebly.com/uploads/1/3/1/4/131437619/jomixetuseromir_nejag_zolowug_zuwitanifog.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4414166/normal_60097fe3ba8a7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5fe79d2e10ded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422637/normal_601c6eecb0cba.pdfIn PDF document text
    • https://ginuwawabesinu.weebly.com/uploads/1/3/1/1/131164414/barobijatofe_sisezusaliva.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://s3.amazonaws.com/lewuli/diva_cup_user_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wutogugej/xamomoda.pdfIn PDF document text
    • https://s3.amazonaws.com/lopeteb/82710601500.pdfIn PDF document text
    • https://s3.amazonaws.com/mubemutolewe/melovuxedo.pdfIn PDF document text
    • https://s3.amazonaws.com/fizaxo/where_can_you_buy_champion_generators.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/la_republica_platon_editorial_gredos.pdfIn PDF document text
    • https://s3.amazonaws.com/savukojubusum/29078516035.pdfIn PDF document text
    • https://s3.amazonaws.com/bodajaku/55750351446.pdfIn PDF document text
    • https://s3.amazonaws.com/luborinizu/kuzekezabiwomefaruzaxi.pdfIn PDF document text
    • https://s3.amazonaws.com/wuvepilamamuse/definition_arobase_informatique.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/gemini_alarm_system_bypass.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/ios_12._4_for_iphone_5s.pdfIn PDF document text
    • https://s3.amazonaws.com/podawakumepewez/brotherhood_mutual_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/zuwexalinuwopepanoxel.pdfIn PDF document text
    • https://s3.amazonaws.com/debiwelof/zudug.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_off000122d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122D5 5248 bytes
SHA-256: bdc5416acf178b722c33d31e71e999a0b053041d081cd92319eb446e19ab6d5e
font_01_sfnt_off0001349c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349C 12008 bytes
SHA-256: 9d472599b499b34ebb9ebc086d16dc213f522aa5fda1ccc6c5da920db0f3a68b
font_02_sfnt_off00015b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15B1F 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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