Malicious PDF — malware analysis report

Static analysis result for SHA-256 50d395380e34709b…

MALICIOUS

PDF

156.4 KB Created: 2021-04-07 10:05:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 77831fbb3c284b4a0e9c54f8b4f88fac SHA-1: c84108ef3e8bbd4787e14a392dda716f1147e195 SHA-256: 50d395380e34709b9ed2e18eb264f2c36726dd0663cc1abbcad3565b036addaf
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains an embedded URL that points to a malicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The presence of an external URI and the overall detection suggest a phishing attempt designed to redirect users to a compromised site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://fokemale.ru/123?utm_term=contemplate+to+do+%25E6%2584%258F%25E5%2591%25B3 PDF link annotation
    • http://kiteleminokovi.22web.org/degonozitalaku.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460963/normal_5fc8b7fcb4cdf.pdfIn PDF document text
    • http://bimiwefumukiv.22web.org/zirufigikani.pdfIn PDF document text
    • https://cdn.sqhk.co/woxiwokujuwe/FijUSha/tererimakosunagubodede.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/h3heigR/demikorarimemoxugexo.pdfIn PDF document text
    • https://cdn.sqhk.co/mukibusu/Vyhbjie/finally_ants_androidoyun._club.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403684/normal_601585c4a284f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/gixawetopoli/how_to_measure_cigars.pdfIn PDF document text
    • https://s3.amazonaws.com/gomaxod/downy_crake_guide_mhw.pdfIn PDF document text
    • https://s3.amazonaws.com/bakoloj/is_the_life_we_bury_a_true_story.pdfIn PDF document text
    • https://s3.amazonaws.com/posufij/full_form_of_f._r._c._s.pdfIn PDF document text
    • https://s3.amazonaws.com/jitimesolagun/kegugerur.pdfIn PDF document text
    • http://dofopesofeze.rf.gd/basie_straight_ahead_sammy_nestico.pdfIn PDF document text
    • http://vinixozu.rf.gd/88859049008.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87e4b641-9f73-4f00-b7b3-e3b9baf445d9/92822637567.pdfIn PDF document text
    • https://s3.amazonaws.com/womirofop/5068673.pdfIn PDF document text
    • https://s3.amazonaws.com/vobuturinivi/93623493372.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6369bfac-d710-459b-aeb3-82d95748477c/77624967398.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5d346c7-c08c-477a-a605-5b6bb6b1c165/can_you_take_back_furniture_animal_crossing.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa05.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA05 99160 bytes
SHA-256: 8eecf27d6e4a7cc4d561e06f986d0d64f489e1dd34b836da831714ef0b291eb7
font_01_sfnt_off0002213f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2213F 3404 bytes
SHA-256: edeb3d54bdec5a574fab4c1b17bb26b2c06ce6131a725bb049f88d7f29403c60
font_02_sfnt_off00022d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x22D4A 4736 bytes
SHA-256: 4f108fd3bf42c895225dce7183579a8e384f3f998039478753792bbd04cf7ed1
font_03_sfnt_off00023d4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23D4A 10724 bytes
SHA-256: 56bbaa2040cee1c5590ad4f6f38f493481d9fdacab963ea34fa7b619609cd2b1

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