Malicious PDF — malware analysis report

Static analysis result for SHA-256 944425eef2e1e67c…

MALICIOUS

PDF

86.1 KB Created: 2021-03-11 14:17:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 6b1faa724470d386178de221d1036df3 SHA-1: 1a4ababe6b8b44c5e997245045a5d4a010ee05fe SHA-256: 944425eef2e1e67c3a4fa0f3947300d9ebbe67a0a1668ab2e8bc27d502a8bc25
126 Risk Score

Malware Insights

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

The PDF document contains numerous links to disposable domains, many of which are hosted on disposable hosting services, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. The embedded URLs point to domains that are part of this link farm, suggesting they are used to funnel victims to a malicious payload or phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://midufefew.ru/award?keyword=prosci+change+management+process+pdf PDF link annotation
    • http://jawunefuda.mygamesonline.org/school_psychology_masters_programs_in_southern_california.pdfIn PDF document text
    • https://rejukikigukaw.weebly.com/uploads/1/3/5/3/135387704/vanojaponuwu.pdfIn PDF document text
    • https://xokaxopo.weebly.com/uploads/1/3/2/3/132302824/1385323.pdfIn PDF document text
    • http://zutolewe.mywebcommunity.org/laraporegako.pdfIn PDF document text
    • https://zewalomoweso.weebly.com/uploads/1/3/4/5/134588134/losux.pdfIn PDF document text
    • https://bepupoxusiboma.weebly.com/uploads/1/3/4/8/134847186/1167101.pdfIn PDF document text
    • http://lalevuw.mypressonline.com/kotepi.pdfIn PDF document text
    • http://jarevine.mywebcommunity.org/toxofemeru.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wejufutaz.onlinewebshop.net/44989420680.pdfIn PDF document text
    • http://namepafubi.atwebpages.com/xemigudasoxufaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c6d8a2f6-6f51-4a73-962a-048597dc045c/does_evening_primrose_induce_labour.pdfIn PDF document text
    • http://forojiwimudobo.atwebpages.com/87869838680.pdfIn PDF document text
    • http://laxufazekez.atwebpages.com/jejefomewakekemarov.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d172fd1-244d-485b-948a-6767058af100/85631863719.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f5566ff9-0e6d-49e8-b815-15485813d3d8/jotok.pdfIn PDF document text
    • https://b6de9e3f-c562-4e05-b5ee-70895c8060ae.filesusr.com/ugd/3801ff_79bd6a2ac0914d39823a9c26167beb59.pdf?index=trueIn PDF document text
    • http://vuxebezedigelun.onlinewebshop.net/pigaxizuxifetasime.pdfIn PDF document text
    • https://df256b98-640c-444d-885a-8195c7360722.filesusr.com/ugd/40b9e6_0e39cd6f3d9a49fe8718774563d7f0ee.pdf?index=trueIn PDF document text
    • https://8a6b9437-e7f2-49d7-8c24-351b272aa67a.filesusr.com/ugd/b18e4d_24defaa3decf48cb80060e029ff22d71.pdf?index=trueIn PDF document text
    • http://duvodix.myartsonline.com/gokip.pdfIn PDF document text
    • http://miganuvag.myartsonline.com/how_to_observe_salatul_istikhara.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_off00011409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11409 5540 bytes
SHA-256: 6bfd63edb2165557f479eecc5cefca53efeab8e4d45107dac27bacc9b104a416
font_01_sfnt_off000126b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126B8 10764 bytes
SHA-256: 6ff9078bc5ce3ecd357a764e63d11d17fc2211a4cd1c87947907bfdfde3ee9cc

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