Malicious PDF — malware analysis report

Static analysis result for SHA-256 a08b16b1f4263261…

MALICIOUS

PDF

68.2 KB Created: 2021-03-08 17:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d483561ee952702723ae8d1d2dc4abcb SHA-1: 2ed99699005de3379b0223c7141e26277c489607 SHA-256: a08b16b1f42632616c62b829367aba578f0fb52c4bc5eafd474aa6782dc5edb0
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of multiple embedded URLs, including one pointing to 'jumiwimov.ru' with a 'self certification form uk printable' query parameter, suggests a phishing or social engineering lure. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to trick users into downloading further malicious content.

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://jumiwimov.ru/123?utm_term=self+certification+form+uk+printable
    • http://rewita.fun/73722903980qfyoh.pdf
    • http://rajajime.mypressonline.com/area_of_2d_shapes_formulas.pdf
    • https://static.s123-cdn-static.com/uploads/4366965/normal_5fcf28070d451.pdf
    • https://static.s123-cdn-static.com/uploads/4383703/normal_5ffb480e2fc1e.pdf
    • http://nakrutkavk.site/hockey_shopping_websitesgbaiv.pdf
    • https://cdn-cms.f-static.net/uploads/4501993/normal_6032ce16ea610.pdf
    • http://teachersaid.fun/88681399277q2vdg.pdf
    • http://biomanix.best/69665441952e5dul.pdf
    • https://cdn-cms.f-static.net/uploads/4404955/normal_6033c2ebdd0cf.pdf
    • http://foselosen.sportsontheweb.net/why_my_car_subwoofer_is_not_working.pdf
    • http://hookup668.site/mii_music_sheet_musicghlp9.pdf
    • http://odemebayisitrafik.com/mimpi_digigit_ular_kobra_menurut_islamdacu0.pdf
    • http://zomoxesami.22web.org/happy_birthday_to_you_sheet_note.pdf
    • http://nextauto02.ru/bapelogavuvubqq1a0.pdf
    • https://cdn-cms.f-static.net/uploads/4408599/normal_6040e35c593b9.pdf
    • http://otshelnik.net/97689907734x8e9z.pdf
    • http://okclub.org/50288173168bc0qr.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://faxaxesaxejov.rf.gd/android_one_special_features.pdf
    • https://uploads.strikinglycdn.com/files/82f87ee4-b422-4849-940f-99ba4e3419bb/sanasiwasoginabijek.pdf
    • https://uploads.strikinglycdn.com/files/4f15e738-5d64-487b-b029-f753b52653fe/63021179279.pdf
    • https://uploads.strikinglycdn.com/files/1de3cb5f-1cca-4eae-8532-d29d091525a3/99746963248.pdf
    • http://pagovogezafub.rf.gd/ropedasigovukuv.pdf
    • https://uploads.strikinglycdn.com/files/d4ae94b0-636a-4ac4-971e-e46d1f50dda9/tugujerujamirejuxin.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_off0000ce05.bin
5b889c7d5aac4c7367d68259a0635d2604b3d36364ba3b2b43e481a4ccfb7b4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE05 5288 bytes
font_01_sfnt_off0000dff3.bin
54172bd81ae95e212ec85b917e0e782e7f1b9109ef87000464ab924465e36875		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFF3 10820 bytes

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