Malicious PDF — malware analysis report

Static analysis result for SHA-256 72495dd61e59fa12…

MALICIOUS

PDF

66.3 KB Created: 2021-02-19 05:47:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 907e15f9bca5d31cad86c1e2fd467b86 SHA-1: 14caae54c970b644ea0ffeefade7ebab8a15f233 SHA-256: 72495dd61e59fa12971b96168e813ffd7c5ed0e5188cdedc20cc392add61561c
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://crophysi.ru/wb?keyword=descargar%20gratis%20libro%20metabolismo%20ultra%20poderoso In PDF document text
    • https://cdn-cms.f-static.net/uploads/4372355/normal_6019f906685b1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462059/normal_5feb35f274b13.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377908/normal_6004a4e83bc7e.pdfIn PDF document text
    • https://cdn.sqhk.co/firokizita/eTCqthe/tixuminirenodirajepe.pdfIn PDF document text
    • https://cdn.sqhk.co/wejawujagi/y1pghsi/94909285024.pdfIn PDF document text
    • http://finansi-7.online/jurnal_keperawatan_hiv_aidsp2yg8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377697/normal_5ff48bdfad88b.pdfIn PDF document text
    • http://tosety.xyz/utorrent_music_albums_2018r0i4g.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/jeduzizonox/suzy_bogguss_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/somisilegex/fursona_info_template.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/english_brushup_6th_edition.pdfIn PDF document text
    • http://vizepojuduw.rf.gd/zugexutoxezamapex.pdfIn PDF document text
    • https://s3.amazonaws.com/bulozor/holt_mcdougal_modern_chemistry_book.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/55397916816.pdfIn PDF document text
    • http://tuwafexom.epizy.com/vivah_full_movie_video_mp4.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_off0000c285.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC285 5532 bytes
SHA-256: 0225da3bb72fb3eb734b1b40756a7ee4ce2277dca382d26474045d743530ddca
font_01_sfnt_off0000d539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD539 11528 bytes
SHA-256: 1bcbdb0684d4e3ec2370e9b2c4c1957672ea9724ebfeca4cb608493ba5944b8c