Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e5d65be9dc868e2…

MALICIOUS

PDF

72.8 KB Created: 2021-03-02 20:08:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d43c641e369a3a3208a1d70657deb5d3 SHA-1: 396fffdb183f8711be19daec5b5ae00cb0b28b75 SHA-256: 9e5d65be9dc868e2a2d2c7622af34d282d0aa5c1f90cc0c724a59b1571effeb9
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting, and is described as a link farm. The presence of external URIs and the link farm heuristic suggest an attempt to redirect users to malicious sites, likely for phishing or malware delivery.

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://ponafet.ru/wix?keyword=dbd+prestige+ranks PDF link annotation
    • https://tumizoma.weebly.com/uploads/1/3/2/8/132814974/ramajujuponukaputi.pdfIn PDF document text
    • https://cdn.sqhk.co/dalubevemex/hjzlNw5/my_taxi_contact_number_cork.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_601bee93563b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485305/normal_6006a410a3396.pdfIn PDF document text
    • https://lesilejot.weebly.com/uploads/1/3/5/3/135314863/ribaduna-dibiwud-poxewutosif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454287/normal_5ff2b1e2b7e17.pdfIn PDF document text
    • http://powajaxib.medianewsonline.com/why_does_my_big_buddy_heater_keep_shutting_off.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377679/normal_5febb748bf039.pdfIn PDF document text
    • http://mapotilij.mygamesonline.org/53837163478.pdfIn PDF document text
    • https://cdn.sqhk.co/duzemata/7EOjfic/woxasopiwodinopaxarevoro.pdfIn PDF document text
    • https://legunumazonum.weebly.com/uploads/1/3/4/4/134455594/todedugurilowo.pdfIn PDF document text
    • https://cdn.sqhk.co/rutunidosaw/gGibmhc/wordscapes_level_8592.pdfIn PDF document text
    • https://cdn.sqhk.co/pedidagow/dutotih/momedobekekaba.pdfIn PDF document text
    • http://diluzadumavotux.getenjoyment.net/vokeparumidiligabapebeb.pdfIn PDF document text
    • https://tixonanixob.weebly.com/uploads/1/3/4/8/134890866/226a983bd3e4d6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xipavir/45154402287.pdfIn PDF document text
    • http://nejimafalun.onlinewebshop.net/navneet_organic_chemistry_reactions.pdfIn PDF document text
    • https://s3.amazonaws.com/sisaxu/wokajuruk.pdfIn PDF document text
    • http://jabodegodonirad.atwebpages.com/tiger_rice_cooker_jbv-a10u_instructions.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_off0000e0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0BE 5300 bytes
SHA-256: a8483c768092ae12c689a2584b391458c3a50d9f74cb02ba746f983123618ff8
font_01_sfnt_off0000f2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CD 10360 bytes
SHA-256: 1eebde5ac8778c9cd24382afe142327e044bdf851fda962637a49e1feee71edc

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