Malicious PDF — malware analysis report

Static analysis result for SHA-256 96acc585428c963f…

MALICIOUS

PDF

69.8 KB Created: 2021-02-07 19:41:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: f3131c1bbac910e11f502119c8c72812 SHA-1: 2ffdcbf0801189ec3a4208dfcbb41b000d8597de SHA-256: 96acc585428c963f38ee99e24149b26df890b202bb5241fea2358498e4108e94
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://yafferge.ru/aws?utm_term=indian+railway+enquiry+apps+free In PDF document text
    • http://helplnstagramoffice.com/marble_age_hackedr9qd5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368731/normal_5fe1919fa4d13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402252/normal_5ff910d04e6ee.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451348/normal_5feb69e7827a4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4385012/normal_5ff527dc1fea6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465142/normal_5fde7898b7b5f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369905/normal_5fcefe4d3e3a2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459785/normal_5fcd74016685c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374700/normal_601f22fa93bba.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413239/normal_5fe68fba4c759.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/xufaxoferugod/wulivasasaxobebipoto.pdfIn PDF document text
    • https://s3.amazonaws.com/poresi/reripuxajomatefavokakevab.pdfIn PDF document text
    • https://s3.amazonaws.com/xupizewuxere/2212032315.pdfIn PDF document text
    • https://s3.amazonaws.com/jazofi/zisewudu.pdfIn PDF document text
    • https://s3.amazonaws.com/sakaburepagase/bill_of_rights_amendments_worksheet_answers.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_off0000d31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD31B 5292 bytes
SHA-256: 6dda671f54333d9159a1b12addb45d5b924fb93087089a37563fe8298e324d12
font_01_sfnt_off0000e540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE540 10968 bytes
SHA-256: d2b1073f186194937ea14d8478b6065bbe5b3c29d00aa655a2ffe5da8e5762be