Malicious PDF — malware analysis report

Static analysis result for SHA-256 7754418c6eae5138…

MALICIOUS

PDF

79.8 KB Created: 2021-03-09 21:11:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: ba1245f27ee2394c5ce881dc9cef34c0 SHA-1: c73dc4016135c4569256b131e10cc8f0ba67fc8f SHA-256: 7754418c6eae513828e314b9cf09cb2136594844f4315df50637744689ef7336
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains, indicating a link farm designed to redirect users to potentially malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a common phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://midufefew.ru/123?utm_term=letterhead+template+word+accountant PDF link annotation
    • http://veronaital.space/how_much_does_cost_to_rebuild_a_transmissionswp3x.pdfIn PDF document text
    • http://spainsale.pro/93678348626t4kfr.pdfIn PDF document text
    • http://radanews.site/gomudufufuzeh2jxz.pdfIn PDF document text
    • http://fasad-dom.site/584975360291igi6.pdfIn PDF document text
    • http://slamelina.website/niresaxefadizokujtrq5t.pdfIn PDF document text
    • http://studyweb.site/96701220201hqs62.pdfIn PDF document text
    • http://study-english-04.space/carrier_hn67kz012_manualrfn3m.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/0dd6fbab-7749-4d30-86df-b4166a5afb34/le_guide_culinaire_english.pdfIn PDF document text
    • https://081e7fb2-604d-424b-9b75-a58d54a71a44.filesusr.com/ugd/abd6ea_55f81dd7730c40038a2101a81e8bd740.pdf?index=trueIn PDF document text
    • http://gozenabuzixi.onlinewebshop.net/98618352443.pdfIn PDF document text
    • https://s3.amazonaws.com/kisimujuk/navuboxoxama.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8d709be1-0593-4fbf-802e-4154dc8ed940/mastering_the_art_of_french_cooking_original_version.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f11d4493-74db-4d89-ae33-e82b594ab92c/is_ccna_200-301_worth_it.pdfIn PDF document text
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_218192d09d234d7b983e60647cbd61f8.pdf?index=trueIn PDF document text
    • http://sazasewugekupej.onlinewebshop.net/masterbuilt_turkey_fryer_recipe_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f8f79f21-d90c-4f91-9078-966ee99ba65e/82091106819.pdfIn PDF document text
    • https://s3.amazonaws.com/dorulusof/rigazewegesuderenodofos.pdfIn PDF document text
    • https://c2267750-1f6d-4c2f-944a-eb302c7f07d7.filesusr.com/ugd/93971e_1cfa8695666f4a16bb68fed58541d99d.pdf?index=trueIn PDF document text
    • https://451cdc1f-766e-44a1-8a9d-f9db2ecad5ed.filesusr.com/ugd/0f0d48_a96d0bf94b7c43d8bc61eda96ed29667.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/45807a0f-cfae-4576-ba29-1754bcd49a3a/the_beautiful_and_the_damned_characters.pdfIn PDF document text
    • https://s3.amazonaws.com/paxuvagal/basatobutefis.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_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 5168 bytes
SHA-256: dea82fc04d3cd32517bf39d058144b25c41727f4d9ab4b5cb5fcdce0a8348c3b
font_01_sfnt_off00010ea0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EA0 10180 bytes
SHA-256: d8e2b3a966169653fae3c87ca066635fd9ce24710b15c1b16db815db6143947d