Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc6c31c53a5d406…

MALICIOUS

PDF

71.2 KB Created: 2021-02-12 13:05:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 47c1fba9af68b2b5cb4eef7ea79951cd SHA-1: b44a04948f0ccfc70390dfdd8959db0958e98358 SHA-256: 5cc6c31c53a5d406a87b86858a7e864eba4f32aabd1fdeea6d6c62464226f31f
194 Risk Score

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
  • 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://crophysi.ru/wb?keyword=vcaa%20exam%20timetable%202018%20pdf In PDF document text
    • https://static.s123-cdn-static.com/uploads/4446636/normal_5ffa8719de2cd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4468828/normal_5ff6c705734da.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489852/normal_60065ca5333dd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387807/normal_601d75755bc59.pdfIn PDF document text
    • http://idealicaitaly-ufficiale.site/27025780147jfysi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407303/normal_5ffa41b00fe2c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368230/normal_5fcc60f0c1d70.pdfIn PDF document text
    • http://appletopshop.ru/social_phobia_inventory9m867.pdfIn PDF document text
    • http://scotiaenlineape-personas.com/januwidifhdau3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465250/normal_60049311b3ba2.pdfIn PDF document text
    • http://jewlgems.com/diamond_ring_shoppers_stopfayju.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450630/normal_5fc978ce397c2.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4445733/normal_5fca226a6d04a.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fonawemosel.epizy.com/dmv_permit_test_answers_ny.pdfIn PDF document text
    • http://golemibafub.epizy.com/10uf_smd_capacitor_datasheet.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_off0000d7d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7D7 5720 bytes
SHA-256: a3fd8e1b391b7e5239d4283307785fae15bdfce5e795c81d626bd424b5c90dc6
font_01_sfnt_off0000eb49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB49 10884 bytes
SHA-256: f41359e914238ace734ba26b0f3660ef361ec527ab8104f31d0c3f757c781322