Malicious PDF — malware analysis report

Static analysis result for SHA-256 68e5a5691e2fc7ce…

MALICIOUS

PDF

69.7 KB Created: 2021-03-14 09:12:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 7f1d13cae97436b3f068419d59e56b60 SHA-1: 31041c48d39d5e4a324d4515d3fdde6acf9a990c SHA-256: 68e5a5691e2fc7ce4d5e6aa27695d17ccb3b318f28604d9040601a8ae5cb7897
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The PDF contains numerous embedded URLs pointing to external domains, indicating a likely phishing or malware distribution attempt. The 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic and the high ML score further support its malicious nature. Although no scripts were explicitly extracted, the presence of external links suggests the PDF is designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jacksth.ru/award?keyword=anfotericina+b+hipokalemia+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4403948/normal_5ff5ed4ea6cec.pdfIn PDF document text
    • http://ctyr.ru/cardiologia_guadalajara_7_edicion_descargar01gp9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391314/normal_6009e804b8bf3.pdfIn PDF document text
    • http://sikutamilom.iblogger.org/orasatha_usurathan_album_song_free_masstamilan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404740/normal_601b7b07b6531.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366045/normal_5fff0ecf53a75.pdfIn PDF document text
    • http://philonio.online/53423818624bq6zg.pdfIn PDF document text
    • https://tekazomegi.weebly.com/uploads/1/3/4/0/134017279/70832a.pdfIn PDF document text
    • http://speak4pro.com/vafalujoranigoxufemis26qa5.pdfIn PDF document text
    • https://mafetoga.weebly.com/uploads/1/3/0/8/130874134/2633f110588dbd.pdfIn PDF document text
    • http://voiprormul.xyz/narrativa_digitall6gmj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/085e45a7-b668-46cc-bd2d-f750cb131663/dd_5e_players_handbook_amazon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/10f198fd-d2ae-4a92-9d96-c069a709f73f/como_ser_un_lider_mas_efectivo.pdfIn PDF document text
    • http://sanikivatuma.rf.gd/59647087337.pdfIn PDF document text
    • http://dowegumorugujon.epizy.com/53624945042.pdfIn PDF document text
    • http://wigikel.rf.gd/94411023375.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/836fd9f5-9761-46c3-9bc5-21b7bbf73359/the_unjust_judge_scripture.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dd4b4b37-434b-49c2-b93d-7b7c5b97fca7/pupojasavu.pdfIn PDF document text
    • http://jawolaguf.rf.gd/56199130061.pdfIn PDF document text
    • http://darajakejaxise.rf.gd/piriformis_syndrome_home_exercises.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e6a522d7-451b-42ff-8e4d-f93fc57f7489/vipir.pdfIn PDF document text
    • http://zubeleboju.epizy.com/self_categorisation_theory.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_off0000d1c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C8 5408 bytes
SHA-256: 1a12637ae07634f3b4c4d4be2e624d50c82e4f1a727120fc592c2715c3c16120
font_01_sfnt_off0000e3ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3FF 10908 bytes
SHA-256: f520d9f094faa6278b822e4b5a124ffcde95bca3d85662cb0c8467049a7ee54a

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