Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0d35f97e43947ba…

MALICIOUS

PDF

79.1 KB Created: 2021-03-14 10:28:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 414bdab54d65a75d39db0fae12e98208 SHA-1: efd073d49de9d0834d63ba9977c6ec0be76e1615 SHA-256: a0d35f97e43947ba7280363890e6479157afb5d48faa5fac0dc7cd908c350657
96 Risk Score

Malware Insights

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

The file is a PDF that contains an embedded URI pointing to a suspicious domain, vilenefex.ru. The ML classifier and ClamAV detection strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the detection suggest it's designed to redirect users to malicious content or initiate further downloads.

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://vilenefex.ru/wix?keyword=originales+libro+pdf
    • https://cdn-cms.f-static.net/uploads/4473954/normal_6044627c849f3.pdf
    • https://cdn-cms.f-static.net/uploads/4368506/normal_603f3ed8d8a08.pdf
    • https://static.s123-cdn-static.com/uploads/4414164/normal_5fd0607b9ec9c.pdf
    • https://cdn-cms.f-static.net/uploads/4425491/normal_603e39cc8aa8c.pdf
    • http://sizijevoji.iblogger.org/10731188360.pdf
    • https://cdn-cms.f-static.net/uploads/4448558/normal_601d3dacd423c.pdf
    • http://ogranifruit.space/bezetapirevetoborjrfwb.pdf
    • http://rafale.store/how_high_do_you_place_a_bat_housec8vra.pdf
    • https://cdn-cms.f-static.net/uploads/4385010/normal_601f75de17108.pdf
    • http://tapabafana.22web.org/tewuwuzusokodeli.pdf
    • https://static.s123-cdn-static.com/uploads/4375196/normal_5fff9d47bdcaf.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://titopamut.epizy.com/problem_solving_approach.pdf
    • https://s3.amazonaws.com/boduxatavepe/barclays_close_business_account_form.pdf
    • http://pubupamosala.epizy.com/bawli_tared_video_song_tinyjuke.pdf
    • https://s3.amazonaws.com/rizezobabub/zosufonin.pdf
    • https://s3.amazonaws.com/xufaxoferugod/tubikamisununaluxone.pdf
    • https://s3.amazonaws.com/sizabo/2007_cadillac_sts_owners_manual.pdf
    • https://s3.amazonaws.com/posaxugidut/poster_presentation_guidelines_conference.pdf
    • https://s3.amazonaws.com/veledabejufi/platform_bed_with_storage_and_bookcase_headboard.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e8f8.bin
5201c82b9570443cad0298bb78b195173411241ffd9469b1eeee5caa24abb8fd
pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F8 5376 bytes
font_01_sfnt_off0000fb40.bin
6e0c7fd531e57a9e27d5eea0ac557c773dae5058c4668f121d8f902cb5036e19
pdf-font-stream PDF embedded font (sfnt) at offset 0xFB40 4432 bytes
font_02_sfnt_off00010722.bin
22e747e0a881b135a409ecd5055b797c03d3f69f9283b5f29c3387ab3f79133f
pdf-font-stream PDF embedded font (sfnt) at offset 0x10722 11844 bytes