Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9030470e2ee590c…

MALICIOUS

PDF

81.2 KB Created: 2021-03-14 05:35:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f031adbf0aac1c2b90b03e89049fa586 SHA-1: ee734c61c875345137a82ae581c1bf3595533d5c SHA-256: a9030470e2ee590cc4e9c3341ea51171d1cfb59ab612b74bb05259a39f5acf47
126 Risk Score

Malware Insights

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

The file was detected by ClamAV as Pdf.Phishing.Trojan and flagged by an ML classifier, indicating malicious intent. It contains numerous embedded URLs, many hosted on disposable domains, suggesting a link farm or phishing lure. The presence of PDF-specific heuristics like PDF_SEO_DISPOSABLE_LINK_FARM further supports the phishing or malware distribution attack pattern.

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
  • 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://mezovuduw.ru/award?keyword=5+arrependimentos+antes+de+morrer+livro+pdf PDF link annotation
    • https://cdn.sqhk.co/geruxibab/n7Fkjc2/digital_marketing_covering_letter.pdfIn PDF document text
    • http://drovazvenigorod.ru/majosakewasugephg7s.pdfIn PDF document text
    • https://wanovupejofo.weebly.com/uploads/1/3/4/5/134580977/71b8a1bca44.pdfIn PDF document text
    • http://wotaxatumumodok.sportsontheweb.net/smart_goal_examples_for_elementary_students.pdfIn PDF document text
    • https://cdn.sqhk.co/sutazojawote/gg5GSCz/oakwood_movie_theatre_hollywood_fl.pdfIn PDF document text
    • https://memuwumobodedo.weebly.com/uploads/1/3/5/9/135974490/jixuwi.pdfIn PDF document text
    • https://voruvagozi.weebly.com/uploads/1/3/4/7/134742827/tidopob_kevazefup.pdfIn PDF document text
    • http://sesesuruko.mypressonline.com/tim_powers_the_anubis_gates.pdfIn PDF document text
    • http://fabermanufacture.ru/wotedoladogowafiv03h92.pdfIn PDF document text
    • http://losqutoq.online/ge_calrod_convection_toaster_ovenn1677.pdfIn PDF document text
    • http://leopolds.space/609554032788oe.pdfIn PDF document text
    • http://dusejetiwogodad.getenjoyment.net/sukuxetikinijeradufopav.pdfIn PDF document text
    • http://fukuzowi.sportsontheweb.net/bosabolekivowala.pdfIn PDF document text
    • http://mamajan.space/21847448353l93gh.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pamapubosozule.epizy.com/sinopsis_pelicula_diarios_de_motocicleta.pdfIn PDF document text
    • http://risogida.rf.gd/2918019840.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f481.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF481 5276 bytes
SHA-256: e76a3159943a3328e59f8829efd0d0c0efee0204cc4a185850e7a49421f07d5e
font_01_sfnt_off0001065f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1065F 1800 bytes
SHA-256: 51ebeec29509b87aa858d500e37ac8853184703d07d1f913ce36d8e1dc7764c0
font_02_sfnt_off00010eed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EED 12320 bytes
SHA-256: c01ef62d7272ea44c33b2d41811b5527ea02720835ef7695f280289513fba783

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