Malicious PDF — malware analysis report

Static analysis result for SHA-256 6465d35acfe2e604…

MALICIOUS

PDF

75.8 KB Created: 2021-03-11 23:35:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: c3e61a753102e1c03ef15c881625384b SHA-1: 2eacc284bb668710b91019216560e6c677c38a7d SHA-256: 6465d35acfe2e6048155054bfe0b4bbc831fe965cbdae1d169fad918b47e4ad6
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, a common tactic for phishing or redirecting users to malicious sites. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of links, suggesting an attempt to create a link farm. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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 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.
  • 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/123?utm_term=my+maths+book+1c+answers+pdf PDF link annotation
    • https://cdn.sqhk.co/nogugojuri/ibWxF1k/monasax.pdfIn PDF document text
    • https://jubekufolofifi.weebly.com/uploads/1/3/4/5/134593927/xubupe_subujipenomipa.pdfIn PDF document text
    • https://sirukume.weebly.com/uploads/1/3/0/8/130814715/rafuli.pdfIn PDF document text
    • https://tariroviwobin.weebly.com/uploads/1/3/4/7/134715354/6308281.pdfIn PDF document text
    • https://tunegize.weebly.com/uploads/1/3/4/5/134500295/426f3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4404116/normal_5fcb51c3aae98.pdfIn PDF document text
    • https://cdn.sqhk.co/vofosutuwo/jaibCjd/35069070432.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_602be4294d42d.pdfIn PDF document text
    • https://cdn.sqhk.co/guvawatuzax/4ghjhid/best_c64_emulator_for_raspberry_pi.pdfIn PDF document text
    • https://cdn.sqhk.co/loberutebe/gi3jiGG/manual_impresora_samsung_clp-_310_en_espanol.pdfIn PDF document text
    • https://cdn.sqhk.co/subesanodag/eggDhcU/sekotebonurimuze.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4416305/normal_6022ca6fd064b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454694/normal_600b67eaafb62.pdfIn PDF document text
    • https://palegovod.weebly.com/uploads/1/3/1/0/131070329/fupixot.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/muvemasoxaji/how_to_pray_for_my_finances.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e0d0933-3c23-48d6-a40d-f4d05f3db670/nawesileminiwaxafug.pdfIn PDF document text
    • https://s3.amazonaws.com/sazixipame/4572507427.pdfIn PDF document text
    • https://s3.amazonaws.com/gupojakami/8100286658.pdfIn PDF document text
    • https://s3.amazonaws.com/faduxodiwo/46367654977.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a78bf4d-71b7-44d5-91c0-dba38651a5c2/imagenes_de_caritas_felices_con_frases.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/85b219b9-2de6-45c6-9a03-ab70f0611d5a/what_are_the_zeros_of_a_function_calculator.pdfIn PDF document text
    • https://s3.amazonaws.com/fipijife/nozuximijujagono.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_off0000ea74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA74 5820 bytes
SHA-256: d16b4fce7e716589ab9c89ec13f18cff7198bcb21408025ddca444f2957c1af5
font_01_sfnt_off0000fe39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE39 10448 bytes
SHA-256: cc70b72abb48693082a3b87401f60305901c45028d55d947775a037a12aeb758

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