Malicious PDF — malware analysis report

Static analysis result for SHA-256 189e93f1ec27af59…

MALICIOUS

PDF

83.0 KB Created: 2021-02-01 01:50:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 103b4507394399d667ffa2fd6e60005c SHA-1: 59b15265e1b7819858908a77c75a1d8ca925459d SHA-256: 189e93f1ec27af59d45024490dd06ec680b4c7742d84bb9c8a74b5e98761af5b
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 external URIs pointing to disposable domains and link farms, indicating a likely attempt to redirect users to malicious content. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

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://baarspo.ru/123?utm_term=what+are+taxonomies+of+cultural+patterns PDF link annotation
    • http://copyrightnotices-form.com/very_best_of_the_eagles_cdwlx94.pdfIn PDF document text
    • http://freehookup.xyz/33549753853fzj1x.pdfIn PDF document text
    • http://dimax.website/xuxulekikesemofovakowif78kk6.pdfIn PDF document text
    • https://nenawopoweso.weebly.com/uploads/1/3/1/4/131406478/5305763.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369663/normal_600a007e3b92e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375086/normal_5fe6e0005a365.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4412183/normal_6002200eb77e0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374696/normal_5fcb8ed6915ba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443608/normal_5ff4af2c3b34b.pdfIn PDF document text
    • https://firikanafumofud.weebly.com/uploads/1/3/0/9/130969048/wofekotowes_dosuviminumiger_mutamelopew_lulidaruwulo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403413/normal_5fe61f6bf1bee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4422144/normal_601425e41b66d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366360/normal_5ff9a9eb13dd1.pdfIn PDF document text
    • https://pebogifi.weebly.com/uploads/1/3/1/4/131438694/katejoresazafonev.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408718/normal_6011d41eb6ff5.pdfIn PDF document text
    • https://boxijobanopuvob.weebly.com/uploads/1/3/0/7/130739783/bikepoz-luredunavetuke.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://rinafuladimuk.epizy.com/54495698387.pdfIn PDF document text
    • http://pepajefosub.epizy.com/11982635752.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fa06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA06 5216 bytes
SHA-256: ebe00626312685dc153a6e16fba789ad034f13dab83358d8c865622048ac38d6
font_01_sfnt_off00010bae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAE 10792 bytes
SHA-256: 126cb34d453f26c5c5b0d74a01b7b7e3f8dc30799b035e6e56b2c6eec860a767
font_02_sfnt_off00013056.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13056 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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