Malicious PDF — malware analysis report

Static analysis result for SHA-256 05435e41178e333a…

MALICIOUS

PDF

76.9 KB Created: 2021-03-18 05:30:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 13bddae0072a112fbf1b60e86d96b039 SHA-1: db6fd7c582d9fe6017664f901da88227b6b86f7e SHA-256: 05435e41178e333a8ab238e128834011cdd43e9c9e0b73aa31a20dc21fe1a741
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable domains and are likely used to redirect users to malicious content or phishing sites. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a deliberate attempt to create a link farm on disposable hosting, reinforcing the phishing or malware distribution intent.

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://leonvi.ru/123?utm_term=handprint+tree+template PDF link annotation
    • http://vasizazesunof.medianewsonline.com/93209047684.pdfIn PDF document text
    • http://voztrans.ru/balveer_returns_hdtzu4i.pdfIn PDF document text
    • http://jobediniberine.scienceontheweb.net/maguwudod.pdfIn PDF document text
    • http://rubeatyshop.xyz/63269928001xw4tg.pdfIn PDF document text
    • http://xezixaz.getenjoyment.net/rupuzulorixijolegofel.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454808/normal_5fe6867fbd254.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414487/normal_6009e6c8b1624.pdfIn PDF document text
    • http://lipexifinidoda.scienceontheweb.net/sda_hymnal_with_music_notes.pdfIn PDF document text
    • http://rukozhop-guide.com/the_north_atlantic_treaty_organization_nato_and_anzus_are_examples_of_igos_that_were_formed222k7.pdfIn PDF document text
    • http://saxobupazes.sportsontheweb.net/levopawumu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412570/normal_604e1c790d7ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476580/normal_5fda6cbde874b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366015/normal_5fcad27e2847a.pdfIn PDF document text
    • http://mesutilixuta.sportsontheweb.net/9699201888.pdfIn PDF document text
    • http://tefuvawilutir.mypressonline.com/aleppo_codex_in_english.pdfIn PDF document text
    • http://wafixevewitope.mypressonline.com/ccrn_study_guide_free.pdfIn PDF document text
    • http://dadivasim.sportsontheweb.net/vufemefizevugiluro.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://ba3a7bb5-edd2-4228-b29c-cf272df6a868.filesusr.com/ugd/bd1c09_b6ea3bb8851b491cb523fd82a9ce9e4d.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2d8639ae-9543-48f9-9e7b-aaa440538671/la_charca_azul_puerto_rico.pdfIn PDF document text
    • https://e02212b7-c8ec-4bf5-ba3e-d68a1de675e0.filesusr.com/ugd/7f1d73_171fac012fae4a0888e7fd58d3f53375.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/14417b62-8ad2-48a4-9671-1253f0e2293c/xubodoxejexubasazumuw.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_off0000edbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDBE 4888 bytes
SHA-256: a40fa889d8288ce9f451ea350ed7279dab2c5dad01beb75ce0747a8a5c2b6eab
font_01_sfnt_off0000fe40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE40 11256 bytes
SHA-256: 0951a6b4e5afa6c454156872a3ba44d7a0dd66db8410353d2167ef6d671a8ecb

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