Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c6f9437fb5c7e74…

MALICIOUS

PDF

141.8 KB Created: 2021-03-24 13:47:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: ff84071cb39d4e8a7c007388523e1c87 SHA-1: f7ef8c6fc912d370b7f2f8922e3658a14e19e2d0 SHA-256: 3c6f9437fb5c7e74cfa0b2be10352506aacb9d65b6527383ee7ceb8ad6d17026
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 host a malicious payload or redirect the user to a phishing site. The document body, though heavily obfuscated, suggests it is masquerading as a datasheet to trick the user into clicking the malicious link.

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://ponafet.ru/123?utm_term=ork+battlewagon+datasheet PDF link annotation
    • http://linodogeb.scienceontheweb.net/73609453147.pdfIn PDF document text
    • http://zuxekagapefe.mygamesonline.org/soxobaku.pdfIn PDF document text
    • http://watogoda.mypressonline.com/paramount_bank_po_books.pdfIn PDF document text
    • http://watulexop.iblogger.org/bokafu.pdfIn PDF document text
    • http://dimozakebaba.scienceontheweb.net/what_is_the_order_of_a_group_abstract_algebra.pdfIn PDF document text
    • http://pepariravifaza.getenjoyment.net/ragetoza.pdfIn PDF document text
    • http://vumexovuvelafe.medianewsonline.com/risk_rules_2020.pdfIn PDF document text
    • http://fuvagezilavez.mygamesonline.org/xaluv.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/79692737502.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/lazesej/29401470715.pdfIn PDF document text
    • http://susegemosesipul.epizy.com/ariens_deluxe_28_snowblower_engine_manual.pdfIn PDF document text
    • http://xonolori.atwebpages.com/28761288920.pdfIn PDF document text
    • https://s3.amazonaws.com/vawoginele/dota_underlords_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/wenobagupexekap/koritapokusal.pdfIn PDF document text
    • https://s3.amazonaws.com/rurosaveruk/18974378869.pdfIn PDF document text
    • http://kigokigaruv.myartsonline.com/88049797993.pdfIn PDF document text
    • http://jadupapobixe.epizy.com/public_relations_degree_online_uk.pdfIn PDF document text
    • http://bilofudako.onlinewebshop.net/calligraphy_styles.pdfIn PDF document text
    • http://memamawu.onlinewebshop.net/bossuet_sermon_sur_la_mort.pdfIn PDF document text
    • https://s3.amazonaws.com/vexosafugunu/wiluvowujilimeluvaxunoku.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_off0001f1ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1EF 5412 bytes
SHA-256: eb5f4a247df10a9d84ebb51e65448b420d5cbd3fc72b4f7ce851907fff0f7a21
font_01_sfnt_off0002045e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2045E 10764 bytes
SHA-256: ec0e15dcaee05355b036c7a5d865a155f65ded62d802ed3104af77bb5cfc97f7

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