Malicious PDF — malware analysis report

Static analysis result for SHA-256 81605dc46c9696bc…

MALICIOUS

PDF

73.2 KB Created: 2021-03-15 15:50:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 44a44d40d69f101a3f10fe4ca240cde2 SHA-1: 7e74c9cadb2b516479ca88989c2f227b42e2758f SHA-256: 81605dc46c9696bc9d23dda78d8831fe9e0912c8bc54110086f856590ffa2088
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into visiting a malicious website. The document body, though heavily obfuscated, suggests a search result or informational context, aligning with a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://leonvi.ru/wix?keyword=gabrielino+key+club
    • http://tarosuzaloku.22web.org/tipos_de_bacterias_gram_negativas.pdf
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5fe9cf65b38f6.pdf
    • http://mishgen.com/18838359885cfcnq.pdf
    • http://apsmall.space/tenakodokapebups9qeb.pdf
    • http://ilook.market/govt.of_india_act_1935geh7d.pdf
    • https://bafuselowazela.weebly.com/uploads/1/3/5/3/135318440/xajig.pdf
    • https://fonekukiko.weebly.com/uploads/1/3/5/3/135393218/berumolomore.pdf
    • https://xafituku.weebly.com/uploads/1/3/4/8/134863640/7577939.pdf
    • https://static.s123-cdn-static.com/uploads/4415770/normal_60031216a6916.pdf
    • http://apparently-home.com/glencoe_geometry_chapter_6_quiz_4_answersy321q.pdf
    • http://bio-ita.fun/just_dance_2_gummy_bear_songlpoac.pdf
    • https://bowefolezoz.weebly.com/uploads/1/3/1/4/131407704/4868046.pdf
    • https://majizozu.weebly.com/uploads/1/3/4/5/134598595/4362041.pdf
    • https://cdn.sqhk.co/lajefage/gsrzDCi/nasa_hoodie_h_m_orange.pdf
    • https://cdn.sqhk.co/muzubasiwu/d1NGgiu/wurulopufikewif.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/tobito/microsoft_sharepoint_server_2013_end_of_support.pdf
    • https://s3.amazonaws.com/lopeteb/tukapulel.pdf
    • http://nufejubonuviwo.epizy.com/mawefiko.pdf
    • http://wujedulagux.rf.gd/example_of_digital_forensic_report.pdf
    • http://kexobub.rf.gd/94252095424.pdf
    • https://s3.amazonaws.com/varoximu/polyethylene_injection_molding_processing_guide.pdf
    • https://s3.amazonaws.com/pazovugal/zikozakupifalipizidetajel.pdf
    • http://musezuw.rf.gd/46465167609.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000de59.bin
e6997c5150b8640f4c71761b79bd02c18606dedfdb722fcbe15f66a4856446ea
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE59 4952 bytes
font_01_sfnt_off0000ef51.bin
1322d7f46cdd5e04e2f931df7eb76fa1c1c231c0979d390e07bfaf893a518f4a
pdf-font-stream PDF embedded font (sfnt) at offset 0xEF51 11424 bytes