Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ba8c30119f3a499…

MALICIOUS

PDF

74.6 KB Created: 2021-02-15 08:15:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 1f66ad8d5f51d45ae4f01d339a00ac45 SHA-1: b26412b62162b07eefdac1f8bcef11e95e449eea SHA-256: 5ba8c30119f3a499e083c94e34f6a4f07335e2f1ba0b36f8e068463d9c4c069a
126 Risk Score

Malware Insights

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

The PDF document contains numerous external links, many hosted on disposable domains, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent, specifically identified as a phishing trojan. While no scripts were directly extracted, the PDF structure and numerous external URIs point towards a malicious document designed to redirect users to potentially harmful content.

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://seumenha.ru/123?utm_term=alabama+deer+season+bag+limits PDF link annotation
    • https://volejodanuba.weebly.com/uploads/1/3/4/5/134593723/xesigi_ripuxitugoda_letumawiz.pdfIn PDF document text
    • https://kowezuvive.weebly.com/uploads/1/3/4/6/134603832/votamududusinez.pdfIn PDF document text
    • https://foziwumiwogesis.weebly.com/uploads/1/3/5/3/135321673/nexebopoxunuzusafile.pdfIn PDF document text
    • https://cdn.sqhk.co/febenapox/gifibhb/color_fill_procreate_not_working.pdfIn PDF document text
    • http://zivetizigomiki.iblogger.org/tovufafakiroruduko.pdfIn PDF document text
    • https://cdn.sqhk.co/ruvonusebex/xnw5Ujh/mountain_climb_master_racing_2_game.pdfIn PDF document text
    • http://molotkov.site/xiriwyxvu7.pdfIn PDF document text
    • http://sutiwejepeb.22web.org/tovexuv.pdfIn PDF document text
    • https://cdn.sqhk.co/rozamulev/gchjie4/58796339990.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nimunofat.epizy.com/horizontal_scroll_view_in_xamarin_forms.pdfIn PDF document text
    • https://s3.amazonaws.com/muwomapotumugi/nadumubukeximo.pdfIn PDF document text
    • http://dusegakalo.epizy.com/acronis_backup_server.pdfIn PDF document text
    • https://s3.amazonaws.com/mefonevimimix/iot_based_energy_meter_project_report.pdfIn PDF document text
    • https://s3.amazonaws.com/tedowafomaru/ankle_osteoarthritis_exercises.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e523.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE523 5276 bytes
SHA-256: 068e4f3a5c88d81eb58881882668440e2b5569956de4301f12e08ef79738d511
font_01_sfnt_off0000f6f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6F3 10864 bytes
SHA-256: e476eb94682a30834f5f09f9b8ce5edd388d69be86521f02d2b611c6ed84a34d

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