Malicious PDF — malware analysis report

Static analysis result for SHA-256 7916eaced1ca8b03…

MALICIOUS

PDF

84.5 KB Created: 2021-04-03 12:12:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 277593df82194e122ff2393b984ed277 SHA-1: 8a5dca9bd230c785645a8634694366d5ca02167d SHA-256: 7916eaced1ca8b03afee08a1379eacb4493377d39597ea1c4eab7f5fa623e1c5
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9970

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://ponafet.ru/strik?utm_term=how+to+fix+a+mini+fridge+door PDF link annotation
    • http://milanomoda-italy.site/youth_conference_agenda_templatejzuah.pdfIn PDF document text
    • http://remontvorot24.com/upsc_exam_information_in_marathi_wikipediazbwha.pdfIn PDF document text
    • http://kotudekudoges.getenjoyment.net/international_journal_of_research_in_pharmaceutical_sciences_abbreviation.pdfIn PDF document text
    • https://cdn.sqhk.co/lajawawinu/jcieijr/hearts_on_fire_fulfillment_necklace.pdfIn PDF document text
    • https://cdn.sqhk.co/jebozibiru/hflgd45/fimivega.pdfIn PDF document text
    • http://winclean-shop.space/carry_on_rainbow_rowell_ita2x0f1.pdfIn PDF document text
    • https://cdn.sqhk.co/waketeni/gh6MijT/titan_quest_atlantis_nintendo_switch.pdfIn PDF document text
    • http://apparentlyopt.com/jofawiahzo.pdfIn PDF document text
    • https://cdn.sqhk.co/vixokezafafu/W51dhdJ/6805802323.pdfIn PDF document text
    • http://neletaparufo.scienceontheweb.net/melifelirotodulagus.pdfIn PDF document text
    • http://kakolamilasaru.medianewsonline.com/marketing_planning_process.pdfIn PDF document text
    • http://xifutipixa.mywebcommunity.org/cambridge_placement_test_for_adults.pdfIn PDF document text
    • http://xorimomupajo.scienceontheweb.net/econometric_analysis_6th_edition.pdfIn PDF document text
    • http://lojapidabud.mypressonline.com/94214136647.pdfIn PDF document text
    • http://meetporte.xyz/138878322886wvvi.pdfIn PDF document text
    • http://zoguponuwuxoli.medianewsonline.com/29398107894.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/why_is_my_roku_streaming_stick_overheating.pdfIn PDF document text
    • https://cdn.sqhk.co/vesagivara/wgfaUyR/hidden_camera_online_shopping_uae.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://200c4c3d-185b-4246-b99f-f40cd7065c99.filesusr.com/ugd/3ed902_8b69525783aa408e9aa4ba3ebf9f3a3e.pdf?index=trueIn PDF document text
    • http://kugukokoner.myartsonline.com/49504529417.pdfIn PDF document text
    • http://mijovutotukedes.onlinewebshop.net/bozomavifaradugud.pdfIn PDF document text
    • https://09972071-4174-499b-90b1-de3619f59f53.filesusr.com/ugd/d1c05f_58a394d3ec5148ca9c5584138fc54499.pdf?index=trueIn PDF document text
    • https://2e907eb7-0cdb-46e5-a4de-ff0e34d1b96e.filesusr.com/ugd/7ea2c5_9e58914d4cdf48fc98cb70049b19b9d3.pdf?index=trueIn PDF document text
    • https://e082b6be-64c0-45f6-a8ff-82b9c6f476f0.filesusr.com/ugd/1479de_c8e80647b55c4122b58d06083531ddc3.pdf?index=trueIn PDF document text
    • http://kikanelomer.onlinewebshop.net/como_hacer_una_bibliografia_en_formato_apa.pdfIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_a7d2e117809e44a7b938360a7ba502db.pdf?index=trueIn 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_off00010c93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C93 5140 bytes
SHA-256: 3e320d7e383a77f8a9c71ca6450aa1795aec240ae8f9da86278382cd9b652dd5
font_01_sfnt_off00011e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E11 10812 bytes
SHA-256: 031d1096330a33319aee4163fa668181cd9601c5419ad04772cecab76348c367