Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4031516b787fd9…

MALICIOUS

PDF

59.5 KB Created: 2020-10-06 23:00:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: c2a510f70b898b8c892ae05fcbfb1fe9 SHA-1: abe10663587d00c7958565288abfc0cb72745bf6 SHA-256: 2c4031516b787fd903009f00556558cc0cbec24f0096331cc45ead7aa9964c62
172 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://ggtraff.ru/strik?keyword=ignou+anthropology+study+material+free++pdf In PDF document text
    • https://site-1039253.mozfiles.com/files/1039253/16536478738.pdfIn PDF document text
    • https://site-1037143.mozfiles.com/files/1037143/welulurowujugu.pdfIn PDF document text
    • https://site-1038789.mozfiles.com/files/1038789/takiluvisumuroxotiguxelor.pdfIn PDF document text
    • https://site-1039563.mozfiles.com/files/1039563/9673744756.pdfIn PDF document text
    • https://site-1037028.mozfiles.com/files/1037028/gopufazupunutikixusigozel.pdfIn PDF document text
    • http://files.21stwine.com/uploads/1/3/0/7/130738806/janobupikorasen_pabebukoj.pdfIn PDF document text
    • http://files.somedaynewfoundlands.com/uploads/1/3/1/0/131070459/6e7b7e33a8316.pdfIn PDF document text
    • http://files.cbmcofmadison.org/uploads/1/3/1/1/131163914/6aa33c7fc262.pdfIn PDF document text
    • http://vejafupol.lakewoodfencing.org/uploads/1/3/0/8/130814328/fezerarivo.pdfIn PDF document text
    • http://xosap.nanspix.com/uploads/1/3/1/4/131453541/1617707.pdfIn PDF document text
    • https://site-1043760.mozfiles.com/files/1043760/37310614965.pdfIn PDF document text
    • https://site-1039490.mozfiles.com/files/1039490/wunimuloxasog.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/fotadevotu.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/jakigajuxosis.pdfIn PDF document text
    • https://site-1040780.mozfiles.com/files/1040780/josorovapazov.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0468/8366/8125/files/42760001359.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4789/2630/files/goodyear_assurance_ultra_tour_review.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
    • http://www.geocities.com/mitra_anirban/hobbies.htmGNUIn PDF document text
    • http://www.gnu.org/copyleft/gpl.htmRegularIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000080e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x80E9 5492 bytes
SHA-256: c75692e8b8f3a7957c8f2075ed32ece0294c8fb8bc4b55dc76b548d64465d88c
font_01_sfnt_off00009377.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9377 3720 bytes
SHA-256: d5ecec3e822993868ba70e247019bcdb656a9fee58d620eb93bc70658e929280
font_02_sfnt_off00009eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9EDA 10552 bytes
SHA-256: 7b023e4ac18594b51feac52604d3362d10844997b85def3a1294e60c25156f5d
font_03_sfnt_off0000c2d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2D7 8792 bytes
SHA-256: 3a21ffde629fffcc2581d929607c4b9ace9b0995f0b2e234700410357b7eafaa