Malicious PDF — malware analysis report

Static analysis result for SHA-256 3395990ed3225ff9…

MALICIOUS

PDF

90.8 KB Created: 2021-03-31 21:12:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d358053d58b5e0eec4aa1cbfd0e10a23 SHA-1: eb5e677d63a05fbab342601b8fee303a07483915 SHA-256: 3395990ed3225ff9d83dc10b9fe77a4c2f76e30670f9a06bbe6158c36decd658
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains an embedded URL that mimics a search result for a book, directing users to a suspicious domain. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to trick the user into visiting a malicious site.

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/wix?keyword=child+development+8th+edition+feldman+pdf
    • https://cdn-cms.f-static.net/uploads/4412174/normal_603147ce10dbd.pdf
    • https://cdn.sqhk.co/fekebazi/cF2Fnhh/lokobexefuxexibivofum.pdf
    • https://cdn.sqhk.co/detatakev/kgeJAhf/unlimited_free_ebooks.pdf
    • https://cdn.sqhk.co/simikitivo/BqyjeHF/nipak.pdf
    • https://cdn.sqhk.co/fipimomozuk/chahcib/btd5_ninja_kiwi_hacked.pdf
    • https://cdn-cms.f-static.net/uploads/4450243/normal_604460b708270.pdf
    • https://cdn-cms.f-static.net/uploads/4493890/normal_6048d4f9d74d7.pdf
    • https://cdn-cms.f-static.net/uploads/4416506/normal_6037e37b4b6ed.pdf
    • https://cdn-cms.f-static.net/uploads/4418191/normal_60315b32159c9.pdf
    • https://cdn.sqhk.co/wetilusogaki/hbjhSQb/up_iti_admission_online_form_2019_date.pdf
    • https://static.s123-cdn-static.com/uploads/4388426/normal_5fe1102e5f78b.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/c4f21442-feec-4989-95c6-ddd794ee5b7b/dyson_dc44_animal_filter.pdf
    • https://uploads.strikinglycdn.com/files/6685b244-80da-43e1-9cde-ac738fadb001/basic_steps_of_strategic_management_process.pdf
    • https://s3.amazonaws.com/zukogi/3850427632.pdf
    • https://s3.amazonaws.com/wulotugadag/75702544217.pdf
    • https://s3.amazonaws.com/bulikowexunepov/gajixal.pdf
    • https://s3.amazonaws.com/waxapoz/calidad_total_tqm.pdf
    • https://uploads.strikinglycdn.com/files/acdde17e-a977-4c8b-bba6-2f06be5f5548/94915904824.pdf
    • https://s3.amazonaws.com/xazarujokemus/45177467586.pdf
    • https://s3.amazonaws.com/dikobepibelun/22757405914.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010e90.bin
d02e6b781b8121c651e6461a51491fa03823d3d0b6f55ff26554fca9c801ade9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E90 5168 bytes
font_01_sfnt_off0001200a.bin
accb41f1e397baa89ef15080958365d8ae3f9170ff8511bf3a4fc5463e7d2600		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1200A 11748 bytes
font_02_sfnt_off00014857.bin
fb4d9d05bd07e4f28e82a0467f0649e408920cebbe99bd377e7a9a6ca960083a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14857 16116 bytes

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