Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4bc73a7df370385…

MALICIOUS

PDF

87.0 KB Created: 2021-04-07 04:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f94f0bce3124bb135778779634f0c7b4 SHA-1: 64c6197989257445b353d310038d664fe99cfc83 SHA-256: f4bc73a7df370385901a605ac5633c1922863bca1b79b29c07fc87d9bf5037d6
96 Risk Score

Malware Insights

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

The PDF contains an external URI pointing to a URL that appears to be part of a phishing lure, disguised as a journal related to supply chain management. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to redirect the user to a malicious site, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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/award?keyword=supply+chain+management+pdf+journal
    • https://cdn.sqhk.co/marezotije/ggq6m1n/vibaluriredugefivazifu.pdf
    • http://sandiego-podcasts.com/40697514017bynxh.pdf
    • https://cdn.sqhk.co/jefigujaxev/clidhgg/21817389723.pdf
    • https://cdn.sqhk.co/kitujesijak/NLnyHib/59846128235.pdf
    • http://mastericy-chistoty.ru/225840002061s38n.pdf
    • https://cdn.sqhk.co/gokarunedod/gg9iibS/jazulopifuzis.pdf
    • https://cdn-cms.f-static.net/uploads/4405409/normal_6019a91ab39e6.pdf
    • http://slampochka.ru/15943333158d0uty.pdf
    • http://rasidafepu.mypressonline.com/dark_souls_3_4k_ps4_pro.pdf
    • https://cdn-cms.f-static.net/uploads/4455178/normal_60451617d0da6.pdf
    • https://static.s123-cdn-static.com/uploads/4412387/normal_6000d870b59d9.pdf
    • http://white-x.fun/10547241332gh3nn.pdf
    • http://carishr.com/dokubezetugilofurozm6h5d.pdf
    • https://static.s123-cdn-static.com/uploads/4491945/normal_5fca9eec8073e.pdf
    • http://vomamafawib.scienceontheweb.net/47279320553.pdf
    • https://cdn-cms.f-static.net/uploads/4465149/normal_602e618d9bb17.pdf
    • https://cdn.sqhk.co/nawinirezuj/feqjjgf/guvutuzaze.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://288dffde-0386-48bd-adba-b069b5f3b70f.filesusr.com/ugd/7e1b39_62607036a81c4f9ca1bbbae888036318.pdf?index=true
    • https://a4067306-84c0-45ce-9c36-3cbb795fcb37.filesusr.com/ugd/d5b970_83f9773a5cf442038660ee84f40829f8.pdf?index=true
    • http://junirawikuxu.epizy.com/36025321908.pdf
    • http://xenilesaripesu.epizy.com/49335498555.pdf
    • http://zejusamipokera.myartsonline.com/human_trafficking_prevention_methods.pdf
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_242ab9c54e884a8eb004de047bf93154.pdf?index=true
    • http://vomewudige.atwebpages.com/17644625904.pdf
    • https://c140f178-ee45-427e-91fe-a3c5f821f67e.filesusr.com/ugd/ebc5f9_84420500632b42f3af7d087842314cdf.pdf?index=true
    • http://tidizovebimike.epizy.com/93545276416.pdf
    • http://nowaginog.epizy.com/pathogenicity_of_malaria.pdf
    • http://wadogaz.epizy.com/bitegazeso.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_off0000fb74.bin
a4e06a2c1c6777719674692a79083ab9dabad3e8a8bfd2ed61f32116b03ccce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB74 5672 bytes
font_01_sfnt_off00010ea8.bin
f57ae3be2c7f1b66f20d6d2146c4d72d3d91cf696024a21e22b42f0969828f9a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA8 10712 bytes
font_02_sfnt_off00013384.bin
4585055c0120e073db6026bba9e3a4ada0549e6d91daf133b13fe5d52b5dac7b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13384 17652 bytes

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