Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb39a60a1f92fd9c…

MALICIOUS

PDF

66.5 KB Created: 2020-12-24 15:06:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0c8fea4768fc74dfbe32580b316611d9 SHA-1: ea62460c14fdc6d765c76614f14990aebd47d05f SHA-256: bb39a60a1f92fd9c60c37cd07d6e103280eaba7ab8ba3b7287736b4ed73c953d
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It contains an embedded URL that directs to a suspicious domain, likely intended to host a malicious payload or phishing page. The document body, though heavily obfuscated, suggests a lure related to educational materials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://trafffi.ru/123?utm_term=introduction+to+the+scientific+method+worksheet+answers
    • https://static.s123-cdn-static.com/uploads/4489054/normal_5fcd6c27b7a4c.pdf
    • https://cdn.sqhk.co/bagudivibi/MouYKij/70355973597.pdf
    • https://static.s123-cdn-static.com/uploads/4385021/normal_5fe01e54098ba.pdf
    • https://cdn.sqhk.co/lepemafe/hhzViN4/office_space_7_bosses_quote.pdf
    • https://luzofimufabo.weebly.com/uploads/1/3/4/5/134590143/bd82e5936f1.pdf
    • https://cdn.sqhk.co/mivesumor/CU8qifS/electrical_circuit_design_software_free_download.pdf
    • https://cdn.sqhk.co/netesatova/qhfgjyW/pelep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/bcdf7f2e-db5e-40bb-81b4-a01091bf1412/encinitas_union_school_district_jobs.pdf
    • https://uploads.strikinglycdn.com/files/c1b9d388-50ae-4812-a880-a4fe9087e7c4/iron_age_clothing_facts.pdf
    • https://uploads.strikinglycdn.com/files/ff29b383-c39a-4c9a-9d19-c2c27a8d06ce/bavifosuruzegoreg.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_off0000c684.bin
59a4a71cea7c5a7a69d033dc5a71e49f50cee7e54246c4a4fda807b147b1683d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC684 5324 bytes
font_01_sfnt_off0000d880.bin
e2ffba2bd21e7a62322780ad00d4290e2083b9f0ecf409dd76c9924d22eacd36		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD880 10952 bytes

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