Malicious PDF — malware analysis report

Static analysis result for SHA-256 0721b8435e522048…

MALICIOUS

PDF

89.2 KB Created: 2021-01-05 19:22:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 3488591b1f6486306f7f51161d2362b5 SHA-1: d76a19ce2061020dbb2dbd297be33eed1f5393ee SHA-256: 0721b8435e52204877f071febdc28b3180e60caef03109643b72ece0de4a69e3
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains an embedded URL that leads to a suspicious domain, likely intended to trick the user into visiting a phishing or malware distribution site. The document body, though heavily obfuscated, suggests a lure related to financial riches, consistent with phishing attempts.

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://trafffe.ru/123?utm_term=the+master+key+to+riches+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4403684/normal_5fd2fce8d8d19.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459631/normal_5fdd2f81c5fae.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4418370/normal_5fcdbfff5bd08.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498404/normal_5fb81f97842c1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4376358/normal_5fc8efc701634.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5fd7d296ee9d9.pdfIn PDF document text
    • https://cdn.sqhk.co/pomorezolo/jjxR7gc/fonewuxapir.pdfIn PDF document text
    • https://cdn.sqhk.co/nokikifabaf/gvhgig9/n._o._v._a._legacy_2_apk_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448337/normal_5f9da17aa11ed.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/saziwijaxodav/chicago_gentrification_report.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/nice_asthma_management_guidelines_2017.pdfIn PDF document text
    • https://s3.amazonaws.com/wifiduxezo/bola_cricket_bowling_machine_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/wizidimawag/zudesipevokewumakaw.pdfIn PDF document text
    • https://s3.amazonaws.com/kitakilesa/amplificateur_oprationnel_idal_exercice_corrig.pdfIn PDF document text
    • https://s3.amazonaws.com/xukonakefules/visegilone.pdfIn PDF document text
    • https://s3.amazonaws.com/zoromexemuzid/stand_banner_design_vector_free.pdfIn PDF document text
    • https://s3.amazonaws.com/gajabedafot/100_egyptian_combed_cotton_percale_sheets.pdfIn PDF document text
    • https://s3.amazonaws.com/ladojenefe/words_starting_with_whi.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_off00011462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11462 5160 bytes
SHA-256: f06f73c6b386acdcd2a075cb2bf47f9109d5d61afe14113d83b10e1e01863544
font_01_sfnt_off000125f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125F1 10472 bytes
SHA-256: e4f4799138f8562612c383f70a52b7ca61fc728e2dd3f074711d15617436bc02
font_02_sfnt_off0001498b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1498B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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