Malicious PDF — malware analysis report

Static analysis result for SHA-256 4336ee23fa89491e…

MALICIOUS

PDF

69.1 KB Created: 2021-02-18 14:39:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 3e7d4553f6a36816ebfbe2ed51df21db SHA-1: a452a09bf2d5546cba13fec9d56235f940e9c9c0 SHA-256: 4336ee23fa89491ea370e858ad5e57b654bc84bb6a9acd559e9107d28e44c8fa
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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.
  • 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/wix?keyword=smc+tim+dong PDF link annotation
    • https://tupobufilu.weebly.com/uploads/1/3/5/3/135310482/4609035.pdfIn PDF document text
    • https://nonelugo.weebly.com/uploads/1/3/0/7/130775267/sofuluxefiselof_babubodune_wadudutexevi.pdfIn PDF document text
    • https://poxolegap.weebly.com/uploads/1/3/1/0/131069824/4840163.pdfIn PDF document text
    • https://modotetizifoxi.weebly.com/uploads/1/3/1/6/131637555/2915707.pdfIn PDF document text
    • https://vobesamufavux.weebly.com/uploads/1/3/4/6/134685964/jududatadakenu_xovaz_pesefusa.pdfIn PDF document text
    • http://reabook.online/54031783372ajy7a.pdfIn PDF document text
    • https://bakubirusi.weebly.com/uploads/1/3/4/6/134680497/5605220.pdfIn PDF document text
    • https://gojatoxemoniro.weebly.com/uploads/1/3/4/8/134894745/fonapomix.pdfIn PDF document text
    • https://cdn.sqhk.co/xenivoronizu/cHRjbii/forza_horizon_4_nissan_240sx_drift_tune.pdfIn PDF document text
    • http://universityru.fun/kowomefolazavutexupevuleoeekw.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/diwitapezu/80706888761.pdfIn PDF document text
    • https://s3.amazonaws.com/bededuxotulapil/dogitetaxogidiweji.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/52826807591.pdfIn PDF document text
    • https://s3.amazonaws.com/petuzutemixuvod/will_make_you_stronger_quotes.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_off0000ccea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCEA 4848 bytes
SHA-256: 68c0858ef74fa3a3baa571f25df307a6f4cdfc617e3dceb565af03716fb0a2f0
font_01_sfnt_off0000dd5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD5C 13892 bytes
SHA-256: 92ae51ba4ceecf9a7560ae63606b704c104662cecfe20126357a960f351229c0