Malicious PDF — malware analysis report

Static analysis result for SHA-256 1368f13a07c2260e…

MALICIOUS

PDF

71.1 KB Created: 2021-03-05 20:48:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: c33bdf9075227beab1596d0130a400ff SHA-1: 45782846587722bb7b13d24a7a914f5491466eea SHA-256: 1368f13a07c2260ea3503357d06b51c27edfc21f2f9c285011b4747988c2036d
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. While no scripts were directly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://maypoin.ru/strik?utm_term=diamond+razor+edge+bow+string+and+cables PDF link annotation
    • https://nevozijefase.weebly.com/uploads/1/3/4/7/134748823/lukogufuju.pdfIn PDF document text
    • https://xidazujagavoza.weebly.com/uploads/1/3/1/4/131453269/1487bd6.pdfIn PDF document text
    • http://juvizex.sportsontheweb.net/curse_of_the_crimson_throne_interactive_maps.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/dark_crystal_2_release_date.pdfIn PDF document text
    • http://gopadaxin.mywebcommunity.org/50520144914.pdfIn PDF document text
    • https://fupakukenig.weebly.com/uploads/1/3/4/2/134234610/86b5a9093.pdfIn PDF document text
    • http://vizazovabula.mywebcommunity.org/fossil_q_explorist_gen_4_bands.pdfIn PDF document text
    • https://jarovoxo.weebly.com/uploads/1/3/4/5/134511136/kexeranab.pdfIn PDF document text
    • https://jarufepijup.weebly.com/uploads/1/3/0/7/130776730/15931a7d3b5d2fa.pdfIn PDF document text
    • http://wurulef.22web.org/mafedipusujepapobuzelubo.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/what_was_the_original_use_of_tobacco.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zijikekiz.epizy.com/camila_cabello_all_songs_free.pdfIn PDF document text
    • http://zenejifawulo.epizy.com/safeway_catering_menu.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/13774428231.pdfIn PDF document text
    • https://s3.amazonaws.com/sepovutapakogaf/parkinson_s_treatment_guidelines_2018.pdfIn PDF document text
    • http://mebexadesojixip.rf.gd/naromadumoxumetuxego.pdfIn PDF document text
    • http://jiwenufaxo.epizy.com/1962_guidebook_for_marines.pdfIn PDF document text
    • http://gajedimigifupet.epizy.com/japujujikisobebajefesuwi.pdfIn PDF document text
    • http://kamaxunavag.epizy.com/keto_reset_diet_recipes.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_off0000d619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD619 5540 bytes
SHA-256: 10deb7e2b88a925506d8466db1ee1fb5fefaee726b1231ff927bdf8e1e6f4cbb
font_01_sfnt_off0000e8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE8F5 11156 bytes
SHA-256: 1db643c1034435103255dbee6b29d17aa641adb3f223761e7552357e0d3e6d06

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