Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7a50dd283e0d037…

MALICIOUS

PDF

74.5 KB Created: 2021-01-03 14:42:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: ab0e082745c4ca4f629f21cb93541da3 SHA-1: c48c453a5979ba8d6c597686f50dd1bea8ffc477 SHA-256: a7a50dd283e0d037b2fc98971b272b5ccc3f748390a8094b650252f4bb539e31
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffmen.ru/123?utm_term=bose+acoustimass+15+subwoofer In PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/561c7fd99eb.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379984/normal_5fca90d091adc.pdfIn PDF document text
    • https://kosodakugup.weebly.com/uploads/1/3/4/6/134655388/ac8abd8a387c43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368479/normal_5fda5ec224742.pdfIn PDF document text
    • https://zoponexe.weebly.com/uploads/1/3/1/6/131606878/gobopufilelubas.pdfIn PDF document text
    • https://xoxisutebigag.weebly.com/uploads/1/3/1/4/131453062/ditevetemododi-dijutevuwubenu-zofufidoxatajin-bugewevaj.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/dogazisuze/psychology_third_edition_schacter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/93e609f5-d35a-449d-ae0a-750f8b632175/the_wheels_of_life_gino_vannelli_lyrics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43963772-84c7-4287-be56-b70d0065ac75/dreamcast_emulator_psp.pdfIn PDF document text
    • https://s3.amazonaws.com/gofiguj/instagram_dark_mode_android_10_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/fumiposamisur/pekexefogonagirivebepite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bbbac3d9-2934-4cbe-85af-e25bfb9caa83/60592783432.pdfIn PDF document text
    • https://s3.amazonaws.com/suxugipipolazog/s_b_p_love_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/94821731266.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 5452 bytes
SHA-256: 27a00927dfbfa443fbb304b7f78854d67d2aa53f79790952cee60df56d66957c
font_01_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 11500 bytes
SHA-256: a50950ba736535c2935914b49808da0e9d57fd37c4e829967cb735f7eb0fedaa