Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d78246a2c9f3acd…

MALICIOUS

PDF

89.2 KB Created: 2021-03-31 20:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 6f2b151ff7840fb83465b44997c91ec8 SHA-1: 7acb21c36f959d24cac3f198cc09e98afa05ef1e SHA-256: 0d78246a2c9f3acdd720285d2fdf8f813ad6f622cf1d9693bf442bd7cdc1fcac
186 Risk Score

Malware Insights

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

This PDF file contains numerous embedded links to external websites, many of which are hosted on disposable domains or link farms, indicating a likely SEO spam or phishing campaign. The ML classifier and ClamAV detection strongly suggest malicious intent. While no scripts were directly extracted, the PDF structure and embedded URIs point towards an attempt to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://xezojetit.ru/strik?utm_term=review+best+label+makers PDF link annotation
    • https://milorupubi.weebly.com/uploads/1/3/4/3/134317418/jazak.pdfIn PDF document text
    • https://fivakamine.weebly.com/uploads/1/3/4/3/134384559/3386101.pdfIn PDF document text
    • http://sallely.xyz/what_does_really_bloodshot_eyes_meanl4uex.pdfIn PDF document text
    • http://wubowobipevoto.mywebcommunity.org/angelcare_bath_support_grey_baby_bunting.pdfIn PDF document text
    • http://uscovidcharts.com/38024658026idsrr.pdfIn PDF document text
    • http://melidagerukebel.sportsontheweb.net/anglophone_crisis_in_cameroon.pdfIn PDF document text
    • http://theandyhong.com/canon_vixia_hf_r60_manualuqagk.pdfIn PDF document text
    • https://pujowuvorokom.weebly.com/uploads/1/3/5/3/135347933/jifunipav.pdfIn PDF document text
    • http://ueuniti.xyz/division_de_fracciones_con_exponenteo9v5u.pdfIn PDF document text
    • http://netewe9.xyz/83332463145ophdc.pdfIn PDF document text
    • http://gofadivus.mygamesonline.org/big_data_analytics_for_beginners.pdfIn PDF document text
    • http://clubstore.pro/wunimanibosukaximoputidwj8we.pdfIn PDF document text
    • http://wide-mean.top/house_of_spirits_baltimore_robbery75hoo.pdfIn PDF document text
    • https://redulexaxoxega.weebly.com/uploads/1/3/0/8/130874010/78a41.pdfIn PDF document text
    • http://cardioactiveufficiale.site/bts_answer_lyrics_romanizedhzk4v.pdfIn PDF document text
    • http://vir-tus.com/jizobewka92y.pdfIn PDF document text
    • https://jowesezowu.weebly.com/uploads/1/3/4/3/134366841/510578.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/ropuba/edexcel_a_level_biology_notes.pdfIn PDF document text
    • https://8fe74c39-3a87-4c3a-a608-3ff9bccb49b1.filesusr.com/ugd/7a7fb1_fa87104c1e9d4768bb62537f285d5041.pdf?index=trueIn PDF document text
    • https://7fe1f042-206b-4735-a408-f56337efeeb4.filesusr.com/ugd/d34b51_f561c754196d4a23a2ee096c90bbe943.pdf?index=trueIn PDF document text
    • https://27475d5a-2981-497d-8cd5-0c310ef10f8b.filesusr.com/ugd/9cb927_2dd5fae4cadf4e31a02a730c1f821290.pdf?index=trueIn PDF document text
    • https://3857ddc0-2b33-46ba-b4a8-ebef9b167687.filesusr.com/ugd/5cc0d5_085d0cfd08e84975a9cfa79a06e0bb8a.pdf?index=trueIn PDF document text
    • http://bojepudadadax.atwebpages.com/sosyal_bilgiler_6._snf_1._nite_test.pdfIn PDF document text
    • https://s3.amazonaws.com/voxulija/nepukumexejetajonel.pdfIn PDF document text
    • https://s3.amazonaws.com/rezugekolaba/reported_speech_imperative.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/77618614730.pdfIn PDF document text
    • https://ebec200a-077a-4e40-8a9f-76f7ec6d8c5b.filesusr.com/ugd/165585_f029ca64c6b443d9be7fcb6743504218.pdf?index=trueIn PDF document text
    • http://pawuzax.onlinewebshop.net/xolutaxugosun.pdfIn PDF document text
    • https://s3.amazonaws.com/bejenosugede/mr_coffee_iced_coffee_maker_with_reusable_tumbler.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_off00011e70.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E70 5192 bytes
SHA-256: 7ed180ba3c8a07dcf147e07b3d31e4b4a277d37148094ff7e784795fc7385bdf
font_01_sfnt_off0001301b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1301B 11752 bytes
SHA-256: 4f8f70420100095aafa77ec0576e3b94a354dbe52db82dd30978a8ee31f0b0ea