Malicious PDF — malware analysis report

Static analysis result for SHA-256 c73279497d7ae432…

MALICIOUS

PDF

76.8 KB Created: 2021-03-20 18:16:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8647ec0e4619e46cbafc39f8d4dbb989 SHA-1: f06903d10e647bfb022822c3403a63732a5a12ec SHA-256: c73279497d7ae43264db354e0291b3a618438022a7aebbefd2e0d26e8a55f818
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious external domain, identified by heuristics as a potential phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were extracted, the presence of an external URL suggests the document is designed to redirect the user to a malicious site, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://bologen.ru/wix?keyword=the+power+of+introverts+pdf
    • https://cdn-cms.f-static.net/uploads/4367642/normal_6023d9705148e.pdf
    • http://penaleduduzib.iblogger.org/83084694066.pdf
    • http://tavegumata.sportsontheweb.net/bokir.pdf
    • http://watertea.space/448287786297n1o.pdf
    • http://sodalabs.club/how_to_find_full_load_current_of_a_transformerrds3v.pdf
    • http://copyrighthelpptteam.com/casio_privia_pxs1000_reviewx6k3h.pdf
    • https://cdn-cms.f-static.net/uploads/4451762/normal_60325eedeffa0.pdf
    • http://2020coupons.info/not_your_sidekick_epubtta2b.pdf
    • https://static.s123-cdn-static.com/uploads/4366666/normal_5ff228012a29d.pdf
    • http://alkostore.xyz/how_to_reset_brother_hl-l2360dws911v.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dexivovadoxexo.myartsonline.com/23508249901.pdf
    • http://mobisojew.epizy.com/genetically_modified_food_benefits_and_risks_answers.pdf
    • http://tawuzosidekelos.epizy.com/lanaruketaxigezo.pdf
    • https://891dfe3a-8969-4df2-b253-5ccc4ebbb7a0.filesusr.com/ugd/e66789_342ee8d32925432c933f10c92641c73f.pdf?index=true
    • https://55963656-6eb1-4b25-bcd5-bb835d65808b.filesusr.com/ugd/0064ae_0b1758454eac4e4aa3e09ce4e76aa3df.pdf?index=true
    • https://78fa80b2-8629-447b-ad63-53e91e8d4948.filesusr.com/ugd/8f02de_ce3d1b7ecd6c42b7b43c69af76e2ab57.pdf?index=true
    • https://45ae50e1-98a8-4501-9ad6-fc0df438eb43.filesusr.com/ugd/b16523_ca9e6fabd34f416ab7052b27d87e0aae.pdf?index=true
    • https://ed8cecbe-9888-40ab-9384-4b5b2efda5e6.filesusr.com/ugd/22dd42_1a17ce21d8c64b39b2d19b622ff70dbd.pdf?index=true
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_81890a49d6da4945853887307f2e77e5.pdf?index=true
    • http://joriboka.epizy.com/41852782272.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_off0000f1b2.bin
637888afdf09989890c2e444ef491283aa9d21a42497a8b3b2184104459e9b23		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1B2 4988 bytes
font_01_sfnt_off000102bd.bin
9eea45dec50d2a1e1760de69a07a3e30bbd8a08671fa3f742a1dd88848f0890a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102BD 10360 bytes

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