Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bc9fec54baad723…

MALICIOUS

PDF

79.4 KB Created: 2021-04-23 01:55:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 4bffe5e933464c6e7319fd043c58abff SHA-1: 26668da00c3c8b90a2eff237390fd053ec0b0ef9 SHA-256: 3bc9fec54baad723c6274e4d3c87a5084ea1ca7d9a521991016103a00c5017be
126 Risk Score

Malware Insights

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

The PDF file contains embedded URLs and heuristics indicate it is a link farm on disposable hosting, designed to redirect users to malicious sites. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded URIs point towards an attempt to redirect the user to a malicious domain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://jumiwimov.ru/strik?utm_term=2015+nissan+sentra+service+manual PDF link annotation
    • http://itawomen.fun/5_relationships_of_confucianismlea3i.pdfIn PDF document text
    • http://merovew.xyz/30200298451n9foc.pdfIn PDF document text
    • http://zivemigidefis.mypressonline.com/mefakur.pdfIn PDF document text
    • http://ontrade.top/580814745076pbu9.pdfIn PDF document text
    • http://nnorm-id.com/28186640198f1a1t.pdfIn PDF document text
    • http://instas.site/715292691311s6py.pdfIn PDF document text
    • http://spoonnumberone.xyz/safewatch_pro_3000_change_master_codeknbmm.pdfIn PDF document text
    • http://maykistore.ru/citizen_titanium_sapphire_marinaut_gn-4w-swwr7j.pdfIn PDF document text
    • https://cdn.sqhk.co/fakupavod/bjcfVgd/gezirizadomiruvawilisabom.pdfIn PDF document text
    • https://cdn.sqhk.co/tiwopaperuv/fXwId0a/bedobitekinodideminataral.pdfIn PDF document text
    • http://xsafak.com/25162066859v1cb0.pdfIn PDF document text
    • http://bigwin-1xbet.fun/77970741033pqp20.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
    • https://uploads.strikinglycdn.com/files/a299a8cc-8c16-4f55-97e7-7cf1e4f80bad/xedubusulos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ace7f38-c835-4ad4-8ec1-e960abb2c8e3/lajagimijesilenodutuvuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b85b0467-55a6-40e8-92f8-e0c830b38ce4/moneserelemazavezavalu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/75bee1c9-cbba-4d0a-98f4-8bcefb3599c3/nipuneriwotatito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c124f27f-d688-462d-b23a-bc3ae8a9bd19/pabagixakigu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/77a81a9f-f3e7-44c7-934d-407eade7b2a3/hummingbird_fish_finders_side_imaging_reviews.pdfIn PDF document text
    • http://wemaxoseni.myartsonline.com/68388600296.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd3053fc-8c86-416a-aff1-9d62938bd001/vezedipo.pdfIn PDF document text
    • http://dijipola.onlinewebshop.net/36800457677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ec46477-bbe4-4e1b-9f9b-91fdf1ae4b8f/2249766521.pdfIn PDF document text
    • http://tuxefunuzire.atwebpages.com/vokekad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca96ed0d-ee7b-4846-9ec3-6f50ad25b020/56049927391.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_off0000eb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB3B 5132 bytes
SHA-256: e43a5b29bd7588238cff5a3e03424c541c4e0d36a298b9b6e9357583d72fb1fd
font_01_sfnt_off0000fc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC92 11076 bytes
SHA-256: 94ebe80678c7562221dc81716c52707e65d3f3479b7c9c2a33de908f3d6f3974
font_02_sfnt_off000121f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F1 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378