Malicious PDF — malware analysis report

Static analysis result for SHA-256 6041964289090958…

MALICIOUS

PDF

86.8 KB Created: 2021-04-21 19:50:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: f1e76d35bce1e08bec51b08205adb58a SHA-1: b651ac2aa01801744617f5bb94503eabd43f5dfe SHA-256: 6041964289090958a51939340c5fabc9828ed88ec6f5fd463b90abfa3f19151d
126 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including ML and ClamAV, indicating malicious intent. It contains numerous embedded URLs, many pointing to disposable hosting and link farms, suggesting a phishing or scam lure. The presence of external URIs and the 'link farm' heuristic strongly indicate redirection to malicious sites.

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://maypoin.ru/strik?utm_term=what+are+the+23+marvel+movies+in+order PDF link annotation
    • http://robugipunebib.mygamesonline.org/jezalelome.pdfIn PDF document text
    • http://jurojegame.getenjoyment.net/shark_navigator_deluxe_upright_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472188/normal_6068b27157b16.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459326/normal_604844153dd70.pdfIn PDF document text
    • http://giwapozolaleg.mypressonline.com/lagat.pdfIn PDF document text
    • http://wugedasogulal.iblogger.org/diagrama_de_caso_de_uso_ejemplos_resueltos.pdfIn PDF document text
    • http://tepoparupomo.medianewsonline.com/colonial_agriculture_in_africa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455684/normal_606201742306c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369330/normal_602cb21eb549b.pdfIn PDF document text
    • http://xelamoxadavas.mywebcommunity.org/rumijowog.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375080/normal_605ce8bb142dd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fowikorejodi/23000112822.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ff9bbb-d50e-4540-ac56-67046edd6153/toyota_camry_2020_price_used.pdfIn PDF document text
    • http://newemepakirid.myartsonline.com/how_to_program_liftmaster_garage_door_opener_375ut.pdfIn PDF document text
    • https://s3.amazonaws.com/mixanaz/15547911054.pdfIn PDF document text
    • http://dozuxix.myartsonline.com/2012_chevy_silverado_ltz_mpg.pdfIn PDF document text
    • http://tuxefunuzire.atwebpages.com/beveronu.pdfIn PDF document text
    • http://jizozamom.epizy.com/11248241713.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/132967c4-aac5-45ca-a552-bb853fd06a56/2849670474.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010857.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10857 5224 bytes
SHA-256: 0c173523bbcc33460bf41a9442e1ec62931cf5dd805f0e4ab920fcc42869dc9d
font_01_sfnt_off000119fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FB 11084 bytes
SHA-256: ec338dc53b67d42651227685c664a958c5da7a91f65adf72eb62da4ef173ee18
font_02_sfnt_off00013f78.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F78 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

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