Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a31f7d75ceaacb0…

MALICIOUS

PDF

73.6 KB Created: 2021-02-19 18:43:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: afa5995a6a74f4c1847ed5324c83a617 SHA-1: a3e4dc615e70924210780175ff16588aa787c366 SHA-256: 2a31f7d75ceaacb0d230b3707c3af29d3a0f50f8d351ab32b0ed463ca2030a15
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that masquerades as a printer manual, likely to trick users into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI are typical of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://maypoin.ru/wix?keyword=datamax+m+class+mark+ii+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4411931/normal_60045d598167c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486190/normal_60018f25e44d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413846/normal_5fdb734e31a00.pdfIn PDF document text
    • http://lexusesadedebaz.22web.org/53196350843.pdfIn PDF document text
    • https://cdn.sqhk.co/detokelixipi/oEjjhig/pink_ice_cream_cone_drip_cake.pdfIn PDF document text
    • https://cdn.sqhk.co/pirujezexod/TWxAygg/ravens_steelers_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420760/normal_5fcb054bea7cb.pdfIn PDF document text
    • https://cdn.sqhk.co/salusasopuvi/idfDQhb/59346922004.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4499635/normal_60059ca8923e4.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/nazekisigiduz/newomoreref.pdfIn PDF document text
    • http://sededuvox.rf.gd/16723088741.pdfIn PDF document text
    • http://bavidoripo.epizy.com/57839290122.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/standar_akreditasi_rumah_sakit_kars.pdfIn PDF document text
    • https://s3.amazonaws.com/tibitexil/call_of_duty_strike_team_obb.pdfIn PDF document text
    • https://s3.amazonaws.com/bufexa/angular_8_reactive_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/claim_form_l_g.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_off0000cf14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF14 5076 bytes
SHA-256: 9fbdd445d886df986c239ca0c1eda604fcfb8e075f16dc3b2c771ae0a380f8f4
font_01_sfnt_off0000e04c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04C 10292 bytes
SHA-256: 8bc4dfd053268bf71951cd7946816bf746c81fcc927458aacd852325354a0d1b
font_02_sfnt_off00010372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10372 16240 bytes
SHA-256: c71ad209d3f40f4afdf3b8818c0794654f9c838e4fd783bfde958e4624144c3c

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