Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fefaf24d88808e7…

MALICIOUS

PDF

74.4 KB Created: 2021-03-15 04:16:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 7004b9094d6d4b5da9a8c74b7830a540 SHA-1: 9624213206cb92817ac0709f24fef1d9f9da2e64 SHA-256: 9fefaf24d88808e7e8dd339efc7b72a2b202fdb32d2d2f5e8c014e02caa04878
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9996

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://ponafet.ru/123?utm_term=galvanized+sheet+metal+properties PDF link annotation
    • http://rulimiwe.22web.org/rozerape.pdfIn PDF document text
    • http://matizaw.mywebcommunity.org/nesonun.pdfIn PDF document text
    • http://kikovetademu.22web.org/50661388971.pdfIn PDF document text
    • http://vogudikomi.getenjoyment.net/2494350071.pdfIn PDF document text
    • https://vataripisak.weebly.com/uploads/1/3/4/6/134600115/8646247.pdfIn PDF document text
    • https://mazoguwikite.weebly.com/uploads/1/3/4/6/134614920/5fa2f7.pdfIn PDF document text
    • http://jigikujed.scienceontheweb.net/antalgic_gait.pdfIn PDF document text
    • https://lomimasexoguxi.weebly.com/uploads/1/3/4/7/134736135/64bc5c0d9401654.pdfIn PDF document text
    • https://luwusimoxoxaxa.weebly.com/uploads/1/3/1/4/131453453/suvitez-vadejoviliwomim-sukumoranenu-ziwasos.pdfIn PDF document text
    • https://lorivomewojesab.weebly.com/uploads/1/3/0/8/130813497/b0a41f58bddeb6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fufudaloxola.onlinewebshop.net/black_and_decker_40v_string_trimmer_review.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76e46607-97b5-423b-bc5e-163b21bb896f/lakadulopezelebelixor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a91ae634-103c-4ed6-8852-52bf5f2d9c4b/instructions_for_putting_on_a_vinyl_decal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d92e90fb-13bb-448c-91f5-9645d6ccba19/46582555675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14d47e3d-870f-4c37-a283-b8ab018eabb9/foriwefakubofagujon.pdfIn PDF document text
    • http://rokidibamufoduv.epizy.com/1999_yamaha_kodiak_400_oil_change.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c0638e9-ab9a-48a7-8e09-cec87812985a/nec_model_dsx_22b_display_telephone_manual.pdfIn PDF document text
    • http://zatuvejamubolo.atwebpages.com/scheduled_caste_certificate.pdfIn PDF document text
    • http://pojurevowope.epizy.com/lojetubuwibitabodawo.pdfIn PDF document text
    • http://kofepiropi.onlinewebshop.net/acog_practice_bulletin_no._76_postpartum_hemorrhage.pdfIn PDF document text
    • http://gumizaxewa.atwebpages.com/2017_amc_10b_solutions.pdfIn PDF document text
    • http://bafimilatape.epizy.com/que_es_el_cariotipo_humano.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_off0000e419.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE419 5340 bytes
SHA-256: e7a1f0fa9504a233595dbd961c2ea7fa8c5c8b8f0f79504ce7d036d1ee145a33
font_01_sfnt_off0000f628.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF628 11228 bytes
SHA-256: f57c5d8cf75f46e40823d9f5d165ec237695631c4fe68f7a304037b86b46b904

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