Malicious PDF — malware analysis report

Static analysis result for SHA-256 98fc5cb6a2115ead…

MALICIOUS

PDF

82.2 KB Created: 2021-04-20 17:24:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a5a553320d5aead8756101e89cf6621d SHA-1: 192c9385a4d98cd71cc15c0461830c3da91574af SHA-256: 98fc5cb6a2115ead0db4fad274628bd8796ea77a2d78677b2b7f9d18a70051b7
126 Risk Score

Malware Insights

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

The PDF document contains numerous embedded URLs, with a significant portion pointing to disposable hosting and exhibiting link farm characteristics. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. The presence of embedded URLs suggests an attempt to redirect users to external malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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=what+does+the+word+self-knowledge+mean PDF link annotation
    • http://ruwegekugite.22web.org/59958382336.pdfIn PDF document text
    • http://raxewaponoxiv.mygamesonline.org/clinical_pharmacy_and_therapeutics_3rd_edition.pdfIn PDF document text
    • http://pozopamux.iblogger.org/functional_analysis_balmohan_limaye_free.pdfIn PDF document text
    • http://nebatomefov.scienceontheweb.net/wibujanureda.pdfIn PDF document text
    • http://mon-cmso.best/459141081236d5xs.pdfIn PDF document text
    • http://amandeepsadyora.com/wumilucs0sh.pdfIn PDF document text
    • http://jinijazutafenix.22web.org/paid_time_off_upon_termination.pdfIn PDF document text
    • http://es50off.pro/5_minute_journal_app_free_downloadvxv4r.pdfIn PDF document text
    • http://bisewilorilamej.sportsontheweb.net/37856512303.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/riloxezijefepa.pdfIn PDF document text
    • http://gloslides.com/zokizakojiwupapeparuxjas32.pdfIn PDF document text
    • http://airned.ru/gopuwebhh6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_fcbbcc4f61c2422787d3dd32a6b5073c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/1656a011-b77a-49ab-ba57-b98ee9e80461/reacciones_de_neutralizacion_ejemplos_de_la_vida_cotidiana.pdfIn PDF document text
    • http://supumigo.epizy.com/keduselugaweteza.pdfIn PDF document text
    • https://ca483b97-61ac-4196-bca0-6b249c18eca9.filesusr.com/ugd/b27199_857fcc48c774422d884fdd750e84caa3.pdf?index=trueIn PDF document text
    • http://wegarasuw.epizy.com/459336749.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0da41ef2-0008-47e4-9779-af03de5ff1ef/lowegaladulofinog.pdfIn PDF document text
    • http://fowagamop.rf.gd/simple_cost_sheet_example.pdfIn PDF document text
    • http://gavutubawoxin.epizy.com/costing_analysis.pdfIn PDF document text
    • https://832c8a8d-f05d-46e3-9166-97d9de82ace4.filesusr.com/ugd/432509_5a156d80f4a74f63bd761abd8333d246.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d3543687-c721-40b8-8abf-77a83df8b6d1/what_are_the_duties_of_a_medical_laboratory_scientist.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7df15345-e2e1-41c1-b9f4-78a90a4bcb85/jirabasofajadujuze.pdfIn PDF document text
    • http://baxewape.myartsonline.com/fitbit_versa_lite_bands_australia.pdfIn PDF document text
    • https://5c90cfa9-af55-48e2-9430-1f3580382729.filesusr.com/ugd/e2b09b_ec172f582d5d40c5b8b2aa3140d579d4.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_off0001043e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1043E 5524 bytes
SHA-256: 89d44925e493cf75282eb6a7a33a890717b72f5c3948c6b19f13bc1611015a07
font_01_sfnt_off000116fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116FB 10420 bytes
SHA-256: 3410d95f9e41ff8749d87ce32a2b0a96c554b59a7e7b82e57cbeed2ffed3620c

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