Malicious PDF — malware analysis report

Static analysis result for SHA-256 3a8eb0cab79b4c25…

MALICIOUS

PDF

90.2 KB Created: 2020-11-24 21:39:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: b1d1689476d1b2020466124859fabf9a SHA-1: 636e90632c5ad0f8001b4d4489f03754ca67fce8 SHA-256: 3a8eb0cab79b4c25c97770a3a2241ffea9a29260a4dea561ab8d44a47d6bb0e2
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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.
  • 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.
  • 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/123?utm_term=bad+blood+pdf PDF link annotation
    • https://kagafalevusina.weebly.com/uploads/1/3/4/3/134368330/vubirizumaduworodegi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367007/normal_5f89f05877a67.pdfIn PDF document text
    • https://vovufopoxin.weebly.com/uploads/1/3/4/4/134466437/fokamurijukanes.pdfIn PDF document text
    • https://lijonalorobu.weebly.com/uploads/1/3/4/3/134340538/4c4b49f22.pdfIn PDF document text
    • https://mulovepo.weebly.com/uploads/1/3/4/6/134666579/janexawagasozujov.pdfIn PDF document text
    • https://moguvikob.weebly.com/uploads/1/3/0/8/130874292/telumuvafe.pdfIn PDF document text
    • https://kamijiruwidezi.weebly.com/uploads/1/3/4/3/134387945/zijemowilix.pdfIn PDF document text
    • https://sibakixode.weebly.com/uploads/1/3/2/8/132814768/vajomepidibaxi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367283/normal_5f9c04dfcaa81.pdfIn PDF document text
    • https://vuwakoge.weebly.com/uploads/1/3/4/3/134368269/3586175.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/zijipudib.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://s3.amazonaws.com/vexeliku/tihar_jail_delhi_image.pdfIn PDF document text
    • https://s3.amazonaws.com/wogikokuzotaxa/durerijekaxunisepiroz.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_off0000c90c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC90C 25424 bytes
SHA-256: 577ae359c822032a2a2b40cd2a0b617ac24e34e9f0c5a08e251bae4d8c2bfdc5
font_01_sfnt_off00011849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11849 4388 bytes
SHA-256: 8e9b61b52bef6c91b3fa78bf3def25aec07a500b6a7628fed5d6cf6836b38cbc
font_02_sfnt_off00012728.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12728 10476 bytes
SHA-256: 0708821b65a53d47dd58de6ec945e76b19171dbe36f73da2ed3c11d84b285806
font_03_sfnt_off00014b16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B16 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230