Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ba34df412813e47…

MALICIOUS

PDF

77.5 KB Created: 2021-03-27 16:00:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e9942383aaacc2f70552b07932ad5300 SHA-1: 3e9c5be05a2bfe3075b79133384d8c8e4dfcd69b SHA-256: 0ba34df412813e4740150dba97d8ce1e7d616125891cc6a708358e3e8f7cda80
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URIs, with one heuristic specifically identifying it as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were extracted, the sheer volume of links and the detection results point towards a malicious document designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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 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://fokemale.ru/wix?keyword=sj+montgomery+school+supply+list PDF link annotation
    • http://lizetadolanut.iblogger.org/ageless_body_timeless_mind_deepak_chopra_free_download.pdfIn PDF document text
    • http://bilomibedaralo.iblogger.org/24236920495.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459482/normal_603c2fb1885c1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416327/normal_6012ac2d1949e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453129/normal_601b0b82304ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411493/normal_5fe80e8131a2f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fujirezidixivu.rf.gd/chemistry_zumdahl_8th_edition_slader.pdfIn PDF document text
    • http://dodarululi.epizy.com/jimokedibezatapumodurine.pdfIn PDF document text
    • https://s3.amazonaws.com/fogibi/88784123279.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/247b5a78-060f-4dd9-8d2e-538ab1366167/titulos_de_credito_publicos_y_privados_ejemplos.pdfIn PDF document text
    • https://s3.amazonaws.com/fekife/35057057577.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1128dff-b140-46d5-ba69-18c4029a5c54/how_to_sew_for_dummies.pdfIn PDF document text
    • http://potubavaziripek.epizy.com/made_to_stick_book_in_tamil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/56bb4318-af45-4385-8df8-1eafe0c83b24/mimut.pdfIn PDF document text
    • https://s3.amazonaws.com/dagasopones/30987600842.pdfIn PDF document text
    • http://papitanado.rf.gd/52503724765.pdfIn PDF document text
    • https://s3.amazonaws.com/kaxukok/wabidivefogawi.pdfIn PDF document text
    • http://puvipul.epizy.com/90973602516.pdfIn PDF document text
    • http://sefaweme.rf.gd/fipavokiwewikufemabugar.pdfIn PDF document text
    • http://wemitagokodunes.epizy.com/bamejexolevadeduvabojeve.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_off0000f072.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF072 5420 bytes
SHA-256: f491b60a434cb4faf5c105e927fa7f1f8260bd3d77d7fb0459d58181c18a2554
font_01_sfnt_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 11236 bytes
SHA-256: 9565428062c30f9e3e9b0df969f8a55b951268e84a4877e15a4b093e223cadc9

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