Malicious PDF — malware analysis report

Static analysis result for SHA-256 60b5578f5b01595d…

MALICIOUS

PDF

89.3 KB Created: 2021-03-27 16:09:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: ee88a6aae61826db973a6b600c669c96 SHA-1: 091ef59f94060e35a8c98f57fd19ce856c1e0bf8 SHA-256: 60b5578f5b01595de84a933aec8ced095de03014f6edaa0dce33044109911f7a
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/award?keyword=cadence+calculator+manual+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4374715/normal_600b6ad5f0dbe.pdfIn PDF document text
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/1ec0ec8.pdfIn PDF document text
    • http://myfoxing.online/75285053838qjvou.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413012/normal_60484ee56b82e.pdfIn PDF document text
    • http://digtalcaliper09.xyz/how_to_use_the_hoover_max_extract_carpet_cleanerbhw5s.pdfIn PDF document text
    • https://golizagizaziw.weebly.com/uploads/1/3/4/7/134701046/tivutinedinuji_porikoletefovu.pdfIn PDF document text
    • http://my-favshopg.online/is_jojo_part_7_a_different_universe7p7g3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420039/normal_603ce5ed7b14a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460975/normal_5ffff5a73d710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454172/normal_600feb5c19e98.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463010/normal_6040284b4e07f.pdfIn PDF document text
    • https://kupifibadobibe.weebly.com/uploads/1/3/4/5/134512214/355072.pdfIn PDF document text
    • https://cdn.sqhk.co/jaziwuke/AhfjaNV/stack-_based_buffer_overflow_vulnerability.pdfIn PDF document text
    • http://dk-inc.xyz/rimuroxosavop4dw4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392857/normal_6033468952602.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458838/normal_5fd61a51d9e15.pdfIn PDF document text
    • https://cdn.sqhk.co/gabixeme/dJPhcge/gunbird_2_sega_dreamcast_rom.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
    • 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_off0001123f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1123F 4980 bytes
SHA-256: 12a270d825159d4936ef60057c9bdc7937a846d44f242598cdb9fcd12e2f3ff6
font_01_sfnt_off0001231c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1231C 11480 bytes
SHA-256: 8b0cdb6dc29643b1ddfbc6cd8b31c6ec4a0388f7af70f107e239740c887b431a
font_02_sfnt_off00014a4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A4D 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3

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