Malicious PDF — malware analysis report

Static analysis result for SHA-256 ded8999545720008…

MALICIOUS

PDF

76.8 KB Created: 2021-03-28 16:25:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 0f14bc9ce857874e536e4dc70da58621 SHA-1: 8ce08e226ad34e81d565b6cad9103dd82005d082 SHA-256: ded8999545720008a0133b5078462a457d93a74d196a2c68600cc782dc1e37a0
126 Risk Score

Malware Insights

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

The PDF file contains heuristics indicating it is a link farm on disposable hosting, with a high ML score and ClamAV detection for phishing and trojan activity. The embedded URL points to a suspicious domain, likely intended to host a malicious payload or redirect to a phishing site. No scripts were extracted, but the overall structure and URL suggest a phishing or malware distribution attempt.

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://vilenefex.ru/123?utm_term=bsc+mechanics+notes+pdf PDF link annotation
    • http://vunekopewode.22web.org/tavoju.pdfIn PDF document text
    • https://cdn.sqhk.co/faxonudogot/gjKjjnJ/84342942595.pdfIn PDF document text
    • https://cdn.sqhk.co/jajotulix/fjaaIbl/56982517054.pdfIn PDF document text
    • https://cdn.sqhk.co/vufisolepu/gjfYibp/cafe_racer_mod_apk_latest_version.pdfIn PDF document text
    • https://cdn.sqhk.co/xonizarisu/idheuha/45356988626.pdfIn PDF document text
    • https://cdn.sqhk.co/vukobefebu/igkjfBQ/security_access_control_procedure.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/eAraheL/54851182549.pdfIn PDF document text
    • http://muruxilirafet.iblogger.org/wazatejilanazak.pdfIn PDF document text
    • https://cdn.sqhk.co/bezedono/khfiege/sodapapewurinimuzu.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/waduzirader/lonely_planet_russia_free.pdfIn PDF document text
    • http://zesubilav.epizy.com/kenmore_15_inch_trash_compactor_bags.pdfIn PDF document text
    • http://dizojid.rf.gd/fukaxubolube.pdfIn PDF document text
    • https://s3.amazonaws.com/mukutud/top_10_items_for_wilderness_survival.pdfIn PDF document text
    • https://eaae50f7-3b1c-4f1b-9b3c-e2a48377569d.filesusr.com/ugd/b96e41_99720b64e048466bbb7392537dbef58e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/paladin_dnd_5e_oath_of_conquest.pdfIn PDF document text
    • http://piretiwojof.epizy.com/53557027862.pdfIn PDF document text
    • https://s3.amazonaws.com/tobito/cerastium_fontanum_herbiguide.pdfIn PDF document text
    • https://dfa52777-3edb-460f-9b14-ca5101cd4ecc.filesusr.com/ugd/5360f8_4ddf74e451764c6894f5d13598162a11.pdf?index=trueIn PDF document text
    • https://29c5b005-6627-40e3-9da1-9f9d3dbc34dc.filesusr.com/ugd/7ad284_05ed924ce8244b9d860add4fe2e08b61.pdf?index=trueIn PDF document text
    • http://mojiwajatej.rf.gd/19346201202.pdfIn PDF document text
    • https://510b81f6-be4e-4e40-9acf-3f60af495837.filesusr.com/ugd/5f226b_461e0a5253af4db08d67a7de129f048b.pdf?index=trueIn PDF document text
    • http://tubiruk.epizy.com/fivutanaxoxufupede.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000db29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB29 1780 bytes
SHA-256: 81e0a764fdbc9791166b20ae2935f2309876bacd3d150e4c5eb7fcad2c96a944
font_01_sfnt_off0000e3cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3CC 5316 bytes
SHA-256: 14881a73adac6352e9fe92d451fe4e64a9deda1a29ccf0a70819328ecd22fef3
font_02_sfnt_off0000f5bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5BC 1800 bytes
SHA-256: a36eee06fef6ce219692c4ec918276ac99413e4fd1e3666e4031624f9289d620
font_03_sfnt_off0000fe49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE49 10892 bytes
SHA-256: 38a299887ec9757ef5db671d0a4cc66cef103c00ad474bb84079a86b1263ac0a

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