Malicious PDF — malware analysis report

Static analysis result for SHA-256 e84d1ee2d54d6569…

MALICIOUS

PDF

122.8 KB Created: 2021-03-14 22:40:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: e226227da314894f28e2a2cec90c61d8 SHA-1: 40394cb50659637c4e61c3cf59a2ae49a799301b SHA-256: e84d1ee2d54d656999f24ac7c41c0a804ec9007efe4bedbef9bbffa6cd385075
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically identified as a malicious link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

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://resalured.ru/award?keyword=air+pollution+pdf+file+download PDF link annotation
    • http://retapadu.medianewsonline.com/universidad_del_tolima_sede_tunal.pdfIn PDF document text
    • http://pejazadajenatew.getenjoyment.net/how_to_oil_my_singer_44s_sewing_machine.pdfIn PDF document text
    • https://xevekarisugi.weebly.com/uploads/1/3/4/6/134697334/8d3ef71.pdfIn PDF document text
    • http://tezibif.mygamesonline.org/ford_windstar_2003.pdfIn PDF document text
    • https://sepuvoguzunisam.weebly.com/uploads/1/3/4/4/134488558/gafep_jebirivo.pdfIn PDF document text
    • http://gipilunafa.iblogger.org/ruwekumifapizusodopupu.pdfIn PDF document text
    • http://pikegupima.medianewsonline.com/hp_laserjet_100_color_mfp_m175a_toner_cartridge.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lawewil.atwebpages.com/fakezafizanazi.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_aee8fc8c64db4c90887e5e1ff0147555.pdf?index=trueIn PDF document text
    • https://d896c2b7-539c-4146-aa8a-b39d26e096d8.filesusr.com/ugd/a98ecc_5b319056eea64e7d89329274d9aa5492.pdf?index=trueIn PDF document text
    • http://sirirowevaga.rf.gd/xotit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0d7d6892-76ba-4930-9b6b-7ebb6b718b24/dezetabarasuvuviluv.pdfIn PDF document text
    • http://sisoxonojuta.epizy.com/pallet_adirondack_chair_plans.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/how_to_solve_a_2x2_rubiks_cube_tutorial.pdfIn PDF document text
    • http://bowegasobufur.myartsonline.com/authorship_of_the_book_of_daniel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0a320e9-3157-41e4-841c-d51ffa4ae04c/fisher_paykel_dishwasher_drawer_dimensions.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_off0001a9e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A9E5 4936 bytes
SHA-256: 42e8238e625838bdd64b01ba16404cfcf5bd1335fdf028330db09a7b7eb26748
font_01_sfnt_off0001bad3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BAD3 10244 bytes
SHA-256: 4cb0843927924057c84d013091645564c12a3a19f1375eb9a5bfade26ba1c334

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