Malicious PDF — malware analysis report

Static analysis result for SHA-256 28f07f8df5749b82…

MALICIOUS

PDF

81.5 KB Created: 2021-03-30 06:24:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c14ed6710c6d107557173594de9e3487 SHA-1: e91c59e7a3fe2a147ca328e95a0942e61dcac0db SHA-256: 28f07f8df5749b82c9de5c6d29a58cd73f74546a12fb55b35efd2b1e5043c9ed
136 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, with heuristics indicating it is an advance-fee scam lure. The embedded URL, https://botokaw.ru/wix?keyword=codehs+programming+with+javascript+answers, is likely the primary mechanism for delivering the malicious payload or directing the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://botokaw.ru/wix?keyword=codehs+programming+with+javascript+answers
    • https://cdn-cms.f-static.net/uploads/4375515/normal_605b182cd8597.pdf
    • http://student-yurist.ru/ft_857_software1z1fu.pdf
    • http://trychambre.xyz/hp_printer_2542_ink_cartridgesdgmkv.pdf
    • https://cdn-cms.f-static.net/uploads/4460465/normal_6011c59ac48f2.pdf
    • http://hardcreditcheck.info/xomefinitaxupojabapibepigh0o0r.pdf
    • http://istra-backwater.ru/pebinadatokugemepomem79zup.pdf
    • http://veronaital.space/zombs_royale._io_unblocked_7684mhb.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bf0ad892-a14b-484e-85e6-bba52fd4132c/60147090631.pdf
    • https://s3.amazonaws.com/ximupuv/59289301554.pdf
    • https://uploads.strikinglycdn.com/files/99631a82-d86b-4159-9e77-9e9136fa69ea/21171917210.pdf
    • https://uploads.strikinglycdn.com/files/251b5893-2854-45da-b473-d9d92f099ff1/94393267248.pdf
    • https://uploads.strikinglycdn.com/files/90839ef0-52cb-4709-af67-ee45d21defe3/53799473406.pdf
    • http://nakeviw.myartsonline.com/3389114661.pdf
    • https://uploads.strikinglycdn.com/files/e032eedb-f114-417a-b215-f6ec48a40ce7/what_are_the_different_types_of_intermolecular_forces_explain.pdf
    • https://uploads.strikinglycdn.com/files/4b495668-d6a5-4e55-ae9c-27bc9e429602/vofilakuxidilepove.pdf
    • https://uploads.strikinglycdn.com/files/d691e4f3-2d49-4ce2-83cc-bedd3f85008f/best_smartwatch_with_call_function_in_india.pdf
    • http://bogalibamadom.myartsonline.com/automatic_voltage_regulator_theory.pdf
    • https://s3.amazonaws.com/sinamozagemoger/the_royal_ranger_a_new_beginning.pdf
    • https://uploads.strikinglycdn.com/files/eb867dc0-d1ac-4cf6-847e-cb13a69e8446/28721469630.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_off0000ff7c.bin
101bf9efc98596cb8e5c0c12d5733a9421b8f5bf491b927e907a86cbc2b38b74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7C 5588 bytes
font_01_sfnt_off00011263.bin
2abfeaa14f77852b11a6ec184ce3fbceaf1f7fa6cd0bb7dc7cb704f6b10bed33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11263 11268 bytes

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