Malicious PDF — malware analysis report

Static analysis result for SHA-256 402480c21b2e910a…

MALICIOUS

PDF

99.5 KB Created: 2021-03-18 15:50:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: d27e7200a7be331470c5f534928d8905 SHA-1: e94fa9be04e9adfb0dedd811a1c8b8014b74bc82 SHA-256: 402480c21b2e910ae1a07092290e19304e04a202e601bee0ac9e76178507fca1
126 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous external links, with one prominent URL referencing 'alkaline diet dr sebi pdf', suggesting a lure for users interested in such topics. The presence of multiple disposable hosting links further supports a malicious intent, likely for distributing further payloads or conducting phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/strik?utm_term=alkaline+diet+dr+sebi+pdf PDF link annotation
    • http://honey-love.ru/94811815830nyw34.pdfIn PDF document text
    • http://siviveko.getenjoyment.net/67660561981.pdfIn PDF document text
    • http://kozidozilujivox.getenjoyment.net/what_is_the_theme_of_once_more_to_the_lake.pdfIn PDF document text
    • http://igoscandinavia.com/kivoxunmrxp.pdfIn PDF document text
    • http://plusstore.pro/nozuninaxerejukegaraluviy4f9r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://serumisa.epizy.com/wovirawogulasowid.pdfIn PDF document text
    • https://4abf464d-34d5-4c80-8de5-e64f30e04530.filesusr.com/ugd/8b3eb5_591ef9bbd6c74ca888ed197b952317fd.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/7e080139-b9a1-4c6e-afa0-d74182da4cf1/45299514392.pdfIn PDF document text
    • https://6d4a8fb0-9a8a-4850-8aa1-2b5706121c9a.filesusr.com/ugd/ff2e72_747a713f6f2d47febc8dce19b04177c4.pdf?index=trueIn PDF document text
    • http://dukizovisepo.rf.gd/a_telugu_movie_tamilrockers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4969f7c6-0372-4822-a1f9-79ce9fdd6ed9/how_much_did_paige_vanzant_make_for_ufc_251.pdfIn PDF document text
    • http://tajarajizuwoso.rf.gd/muzifojol.pdfIn PDF document text
    • http://toduwez.epizy.com/new_hollywood_movies_2018_filmyzilla._com.pdfIn PDF document text
    • https://f38be386-5799-403b-9303-fb121113655a.filesusr.com/ugd/6f1aa7_1ab17ef9f5bd493fb6030877b1aa6648.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/0fb3b6a0-233c-4a9e-87da-08c02432c943/gunuwamiwakuxeduwur.pdfIn PDF document text
    • http://lejibop.rf.gd/harrison_cardiologia.pdfIn PDF document text
    • http://xizokokov.epizy.com/54603623634.pdfIn PDF document text
    • http://kotimopinurixig.epizy.com/xerophytic_plants_and_their_adaptations.pdfIn PDF document text
    • http://wifipuve.epizy.com/bayesian_statistics_the_fun_way_amazon.pdfIn PDF document text
    • https://0c6b7a74-1ca0-41da-943c-c268a208a416.filesusr.com/ugd/fef373_77a5ad161c434faeb94516b9329fd2b2.pdf?index=trueIn PDF document text
    • http://gigizuvot.rf.gd/line_6_fbv_express_mk11.pdfIn PDF document text
    • https://0b7b936c-93ac-4a60-9644-6ba220b934cc.filesusr.com/ugd/b4bf80_fb84872408d8491a8f135b5cec1722a5.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_off0001486b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1486B 5228 bytes
SHA-256: 09f55d8707d71b26f7eb7fa5c17c3cf487a97a135736bbe3b387fb2e153ac8b6
font_01_sfnt_off00015a3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15A3D 11368 bytes
SHA-256: 85da29bb87e61e881e9a9bff62361ff6d89888686ee06fda0c15dfe7fa316a60

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