Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f9da093bed79bda…

MALICIOUS

PDF

81.6 KB Created: 2021-04-20 10:51:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: d01e05b25cb99fd95adf5c01b99325ce SHA-1: fe5bb128689898322e2348d53943471d0d45aed1 SHA-256: 8f9da093bed79bdaac9dce1a8c33c8f9677a532c1a6eeb276cc54b8935f02d93
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically pointing to a URL that appears to be a phishing lure for 'Attack on titan game pc download'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high number of links on disposable hosting, suggesting a malicious intent to distribute malware or phish for credentials. The ML classifier and ClamAV detection strongly indicate malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://jottigo.ru/strik?utm_term=attack+on+titan+game+pc+download+bagas31 PDF link annotation
    • http://zaxevef.getenjoyment.net/kimeja.pdfIn PDF document text
    • https://cdn.sqhk.co/noneniwetav/hYjjhgd/siketid.pdfIn PDF document text
    • https://cdn.sqhk.co/nozedimasav/ejj9sig/literacy_skills.pdfIn PDF document text
    • http://nejupike.mygamesonline.org/59038203670.pdfIn PDF document text
    • http://vibemezanolex.mypressonline.com/regimovi.pdfIn PDF document text
    • http://juxowupekabaf.mygamesonline.org/yard_machine_snow_blower_22_oil.pdfIn PDF document text
    • http://dokukuke.mypressonline.com/wiseguy_nicholas_pileggi_espaol.pdfIn PDF document text
    • http://tapagigozi.medianewsonline.com/mirosigakiledetuji.pdfIn PDF document text
    • https://cdn.sqhk.co/jidulopavoji/idddy5O/trate_de_olvidarte_in_english.pdfIn PDF document text
    • https://cdn.sqhk.co/bimowikosaru/diaiiij/emergency_dental_clinic_greenville_sc.pdfIn PDF document text
    • https://cdn.sqhk.co/nobuwinulad/rPgdIhd/fuwefip.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bavatesivo.myartsonline.com/49948158254.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca90379b-55a2-4482-b547-370f0916b4c2/tazabulidirusis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a9a95d8a-e14c-4b6b-998b-8b9624713381/mutuxujanix.pdfIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_191e53f159a94057a022549c542dda22.pdf?index=trueIn PDF document text
    • http://farudigenudoze.onlinewebshop.net/places_at_school_vocabulary_worksheets.pdfIn PDF document text
    • https://5c54d0bb-9de8-469b-abb1-33232a952ba9.filesusr.com/ugd/370e3f_b9218dc4a2734c98aaf90eb00532e6a1.pdf?index=trueIn PDF document text
    • http://movasedumanepe.onlinewebshop.net/defunatarug.pdfIn PDF document text
    • https://3d3b31fc-6152-41c7-b1d4-a4af3afcce63.filesusr.com/ugd/3f8d85_ff4d7a8c2b2545b7b9ebf53e62c7c590.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/b56e7e1a-4e1e-4bf7-86c9-4a21b086d6a3/57581431494.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3af5545e-a91f-4fbd-af8d-4c27c9c7cb92/the_worry_cure_7_steps.pdfIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_424a0297ee544ec0b6cd97cbee6afa62.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_off000100ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100CA 5796 bytes
SHA-256: feff8629dbdb69b07ed36be2933df0721c50434b5503a615efedf99b00d4cce1
font_01_sfnt_off00011492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11492 10684 bytes
SHA-256: 1e5b0a63cdce48e2ef29ea0e0eb67ec586f0e79f0b7837b4cc33ea7ddf9ab6a3

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