Malicious PDF — malware analysis report

Static analysis result for SHA-256 74d85d0e1ce4c4e6…

MALICIOUS

PDF

80.2 KB Created: 2021-04-05 08:12:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d23421e32caa6de6c50e6b5b2c5cdc3f SHA-1: 6cd7faed5f50ca9beebc9c63bf67ab512d007f95 SHA-256: 74d85d0e1ce4c4e6bf17948c0dd3ce6783720e5941d3af45fef35b2f83db68d5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URI that redirects to a URL associated with phishing content, disguised as a psychology book reference guide. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the heuristics suggest a phishing or malware distribution attempt, likely leveraging a PDF exploit or social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://leonvi.ru/123?utm_term=psychology+book+references+apa+format
    • https://cdn.sqhk.co/wofunukasu/2hhFhij/wisepamezifelaponegiz.pdf
    • http://xeeewq.xyz/arena_of_valor_switch_crossplayld8q1.pdf
    • http://graatorama.fun/zuwipukijizonapebiselovovxnm2x.pdf
    • https://cdn-cms.f-static.net/uploads/4373779/normal_602d4c3f6c3db.pdf
    • https://cdn.sqhk.co/fuvebopeweb/QgciifB/slots_free_games_flamingo.pdf
    • http://znakomstva18x.site/wotaxemonukekatev373rs.pdf
    • http://opit.space/giponuvgbbgp.pdf
    • https://cdn-cms.f-static.net/uploads/4393521/normal_5fd274398fd90.pdf
    • https://cdn.sqhk.co/zenegiwowi/ihcPjc9/fill_juice_glasses_online.pdf
    • https://cdn.sqhk.co/bidelefo/hh2gghg/113674118.pdf
    • https://cdn.sqhk.co/tokarikadez/GWgeicJ/29107585931.pdf
    • https://static.s123-cdn-static.com/uploads/4458421/normal_5fecd5b282cfe.pdf
    • http://eyebrowthreadingdallastx.com/38260153967td6kv.pdf
    • https://cdn.sqhk.co/jotepomi/dghP3ij/78847465500.pdf
    • http://logvoz.ru/2997969028483xs7.pdf
    • https://cdn-cms.f-static.net/uploads/4388839/normal_6049cd5d6f480.pdf
    • https://cdn.sqhk.co/xizemeginu/ghchbP0/neurotic_definition_english.pdf
    • https://cdn.sqhk.co/pepupiribojo/jdgdjc0/wizekazeretexu.pdf
    • https://cdn.sqhk.co/xejudawadoni/jSzoie6/50749819833.pdf
    • https://cdn.sqhk.co/mapexuze/pggTiee/jaropuzativov.pdf
    • https://cdn-cms.f-static.net/uploads/4409122/normal_5fe640a07495c.pdf
    • https://static.s123-cdn-static.com/uploads/4495385/normal_5febb14bbf21a.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • 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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f9c8.bin
51825e4c849913e9550b27384c6387cee39510b496d674c540b8db8c0f95c9f8
pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C8 5736 bytes
font_01_sfnt_off00010d2f.bin
48bab02f0812af1dc24f51026193bfef05e80f15a86255c87527482e064bc4f6
pdf-font-stream PDF embedded font (sfnt) at offset 0x10D2F 11156 bytes