Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fb3d286648e236b…

MALICIOUS

PDF

80.8 KB Created: 2021-02-14 01:54:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 2cfd85702710ac7aa0ab8aa7cd4b2d60 SHA-1: e34a679d2cfe0677ce25a1a2a29bfe0ca2315981 SHA-256: 5fb3d286648e236b543ffe095fdb716f1089b106f7c710ebcd6fd31c2108118c
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious domain, likely intended to trick the user into downloading further malware or visiting a phishing page. The document body, though heavily obfuscated, appears to reference printer driver information, suggesting a lure tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://crophysi.ru/123?utm_term=hp+deskject+6122 PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4417213/normal_5febb81dd0f03.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4393499/normal_5fdec35c99e31.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454965/normal_60065d3e29865.pdfIn PDF document text
    • https://sojuseruk.weebly.com/uploads/1/3/4/3/134367588/1697983.pdfIn PDF document text
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/wavimoro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417827/normal_5fd65ac77c0f6.pdfIn PDF document text
    • http://ravitidi.22web.org/feasibility_report_on_maize_production_in_nigeria.pdfIn PDF document text
    • https://galebekamabe.weebly.com/uploads/1/3/4/3/134305591/bf12b21c14a9c.pdfIn PDF document text
    • https://sagakoto.weebly.com/uploads/1/3/0/8/130814189/6324964.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405437/normal_6015ad57adebc.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/5036292.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479684/normal_60246e9a1de0b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4389804/normal_5ff711d801b29.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://topawod.epizy.com/wivupakerafagatoxowem.pdfIn PDF document text
    • http://siwavubixuvavil.rf.gd/17792840219.pdfIn PDF document text
    • http://vejebuta.rf.gd/alcanos_propiedades_fisicas_y_quimicas.pdfIn PDF document text
    • https://s3.amazonaws.com/vetamedisoz/raxibir.pdfIn PDF document text
    • https://s3.amazonaws.com/lekizopiloref/sound_quality_app_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gumegulaxi/azonix_font_free.pdfIn PDF document text
    • https://s3.amazonaws.com/xijilesuzuxo/susaw.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8D5 5168 bytes
SHA-256: 7ecd9e62ceca31ec8d357178c6a478ce2a29b0f7a9ed3e8622fbb439850401c9
font_01_sfnt_off0000fa98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA98 11716 bytes
SHA-256: cf4c7eda9ee52f52711d4cefe2cf5953dcc623c77b66ab88a7089f6840d4202c
font_02_sfnt_off00012100.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12100 16204 bytes
SHA-256: a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd

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