Malicious PDF — malware analysis report

Static analysis result for SHA-256 663cfc4c5cacddc6…

MALICIOUS

PDF

70.7 KB Created: 2020-11-14 00:11:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: 0979343c4fe451bba106d8ca330f4c03 SHA-1: d1495c87d656c08efd68a34f02edb867724bdab4 SHA-256: 663cfc4c5cacddc6bc4a561d628cab582f546e567541dd9d3b0730a4026d4c55
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a ML classifier indicated a high probability of maliciousness. It contains a large number of external links, with one pointing to 'traffset.ru', suggesting a link farm or redirection mechanism. The presence of PDF_SEO_LINK_FARM heuristic indicates an attempt to generate traffic or distribute content through a large number of linked PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://traffset.ru/aws?utm_term=dragon+ball+gt+games+apk PDF link annotation
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/195f3.pdfIn PDF document text
    • https://woxukobu.weebly.com/uploads/1/3/4/3/134392577/poxipalilovav.pdfIn PDF document text
    • https://gamorajemusuro.weebly.com/uploads/1/3/4/3/134316050/bazuxone.pdfIn PDF document text
    • https://tivakoxidedopa.weebly.com/uploads/1/3/0/7/130776298/514ff4a4d.pdfIn PDF document text
    • https://mudukexot.weebly.com/uploads/1/3/4/6/134629884/jepegidi_witub.pdfIn PDF document text
    • https://gorokawuse.weebly.com/uploads/1/3/4/4/134489158/bodakane.pdfIn PDF document text
    • https://zekilunadaxidub.weebly.com/uploads/1/3/4/6/134631079/a2064e0a82e9618.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/cf1565f9-7c6a-4f37-9247-b07646d257ed/magitu.pdfIn PDF document text
    • https://s3.amazonaws.com/zakunafu/ruxuvux.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1417ecb-719a-47b9-994b-fb2ad18585f3/bejivisifitatopejamu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f2699ff4-1dc3-4fde-845f-23208609b2e2/the_docker_book_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff36b73b-b39c-44de-beb0-a55b3c1e7b5d/5512494541.pdfIn PDF document text
    • https://s3.amazonaws.com/gedimuta/charter_spectrum_remote_operation_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/fewunadupop/gewitavo.pdfIn PDF document text
    • https://s3.amazonaws.com/neviwove/puvud.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/gesugepanezaxuzogi.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c943.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC943 5084 bytes
SHA-256: 6fb98162178d0a1c7818b8ac9af00a1827910201f3221ddf31b6fad442f0e591
font_01_sfnt_off0000da6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA6C 10932 bytes
SHA-256: 9374cf11cbe34a9310012199c02067819d9694073a41d1911d43f83485c72e87
font_02_sfnt_off0000ff90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF90 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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