Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1d250ac2cd77524…

MALICIOUS

PDF

75.1 KB Created: 2021-03-21 08:02:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 812069ee9c8f3270caa81aae17953065 SHA-1: a5fb2a9d8ef9e2499fd19f1475316bbde3b0636a SHA-256: d1d250ac2cd775241520492f8e4d685c01762c248f919087c0e93ba4f4900431
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by both ML classification and ClamAV, indicating a high likelihood of malicious intent. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The document body, though heavily obfuscated, contains metadata related to 'wkhtmltopdf' and a 'panel schedule template' lure, indicating a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://jacksth.ru/wix?keyword=panel+schedule+template PDF link annotation
    • https://bibixofepo.weebly.com/uploads/1/3/4/2/134235383/1510074.pdfIn PDF document text
    • http://rejorevubirobu.sportsontheweb.net/66570928256.pdfIn PDF document text
    • https://kamabaxi.weebly.com/uploads/1/3/4/6/134650964/torafusewulilel-mawejagun-bivunuxorowakaz.pdfIn PDF document text
    • https://soletobapikod.weebly.com/uploads/1/3/4/5/134582957/mawovitorixupipirub.pdfIn PDF document text
    • http://vivekawiga.sportsontheweb.net/33595115344.pdfIn PDF document text
    • http://lonemap.medianewsonline.com/batutozatefodu.pdfIn PDF document text
    • http://xiwakaravivomik.scienceontheweb.net/nagutovidurezuxe.pdfIn PDF document text
    • https://nagiwudulowep.weebly.com/uploads/1/3/0/7/130775657/ramasad-dokilipizo-giwukuna.pdfIn PDF document text
    • http://zutatowatipo.mywebcommunity.org/pwm_solar_charge_controller_price_in_sri_lanka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417419/normal_5fe9d72c562d9.pdfIn PDF document text
    • https://pazelofigo.weebly.com/uploads/1/3/4/5/134588761/zurosik.pdfIn PDF document text
    • https://fibimijisu.weebly.com/uploads/1/3/4/4/134461798/ralebonoxexewod.pdfIn PDF document text
    • http://widonatozeg.mypressonline.com/project_report_on_cable_stayed_bridge.pdfIn PDF document text
    • http://midunetojonawiw.mywebcommunity.org/les_infortunes_de_la_belle_au_bois_dormant_ekladata.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476126/normal_6033001189466.pdfIn PDF document text
    • https://basitonivi.weebly.com/uploads/1/3/4/5/134584834/putatalesozu-kisilowaxuzalud-gojibobanakulej.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451363/normal_6045fae1266ee.pdfIn PDF document text
    • https://pegufozexak.weebly.com/uploads/1/3/5/3/135317465/zefuf.pdfIn PDF document text
    • https://wovegusokab.weebly.com/uploads/1/3/4/8/134850220/towolizuzevaxijano.pdfIn PDF document text
    • https://jomefibid.weebly.com/uploads/1/3/4/5/134596324/87a58e0210.pdfIn PDF document text
    • https://kabibejago.weebly.com/uploads/1/3/6/0/136050231/9089987.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374951/normal_6029b2dd5d25b.pdfIn PDF document text
    • https://pafukonogoxaxe.weebly.com/uploads/1/3/1/4/131437157/xivixivowut.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460446/normal_603c5b7be978c.pdfIn PDF document text
    • http://memisada.mygamesonline.org/zinusamadurejetirevenufuj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mawidinivetobi.myartsonline.com/error_code_0x-1ffffdb9.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_off0000e7fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FD 5220 bytes
SHA-256: 515cea7363aaf3c7acce431e57b188403a5526078c5f4ed1e865281f1bf514ae
font_01_sfnt_off0000f996.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF996 10504 bytes
SHA-256: dffd8426c03c29eaa57e3779093d3a06a2dc58662941b069959f8db5aa73ee27

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