Malicious PDF — malware analysis report

Static analysis result for SHA-256 333c5ecd6bffc316…

MALICIOUS

PDF

75.0 KB Created: 2021-03-01 21:39:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-29
MD5: 09b0bbfe25f2b5553c8226487904bd77 SHA-1: 80b9d2a52f8a0763834e85d449689862fa261357 SHA-256: 333c5ecd6bffc316d036b3ab358e48f58665129ea156be5c8c01f704aeab9bf5
134 Risk Score

Malware Insights

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

The PDF document contains numerous external URIs pointing to disposable domains, indicative of a link farm designed to distribute malware. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. The presence of embedded URLs and the 'link farm' heuristic point towards an attempt to trick users into visiting malicious sites, potentially for downloading further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://lozipotod.ru/wix?keyword=download+game+clear+vision+2+mod+apk PDF link annotation
    • http://brumbum2.xyz/accords_guitare_basse_dbutantebmf8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391896/normal_5fdabae399092.pdfIn PDF document text
    • http://mxbur.fun/gaxogogvrf0z.pdfIn PDF document text
    • http://agent-spv.space/gojogisotevepadobopudiim6ff.pdfIn PDF document text
    • http://waystep.site/noboweledutaforilba1c1.pdfIn PDF document text
    • http://train-home.ru/vshare_pro_ipay6keb.pdfIn PDF document text
    • http://teren.fun/ejercicios_de_perspectiva_caballera9inqe.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/java_string_format_long_numbera5gt6.pdfIn PDF document text
    • http://kvrovk.xyz/zizuvuxumia3xnd.pdfIn PDF document text
    • http://islandlandscapesbb.com/nisajimebakisama8oel2.pdfIn PDF document text
    • http://alania365.ru/mining_inc_codes_2020rk1c5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376850/normal_6020cc552fcb1.pdfIn PDF document text
    • http://profaudit32.ru/29589601609lqnz3.pdfIn PDF document text
    • http://metazoaapc.fun/noxuwozuluhmugf.pdfIn PDF document text
    • http://bonboxstudio.com/1981989041swnaf.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/jepinebawo/pisikefivek.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_off0000e621.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE621 5740 bytes
SHA-256: 62c9c878b155ad8e98fd0fb6207ea5717f379371b3c1ab809c156a89219899b7
font_01_sfnt_off0000f9c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF9C0 10936 bytes
SHA-256: 25d2f4aaf0922f4c38900ad53dd138032fe75c654aa75e6b332c8a0c34f57e29

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