Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ebda400f9b3942d…

MALICIOUS

PDF

70.5 KB Created: 2021-02-03 07:35:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 170ad7a2d481d2e61ee2ea8e517202d4 SHA-1: 18ced40250f1021b512874e97132d018fe292caf SHA-256: 0ebda400f9b3942d37f74a04408a3130df1f1ee189165e854f1dfcafd19de522
254 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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/aws?utm_term=cefalohematoma+y+caput+succedaneum+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4473618/normal_5fd95adaa3c99.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4387056/normal_5fe235e6e6510.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4417525/normal_5fe59cc303d64.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384143/normal_5fe55cd999869.pdfIn PDF document text
    • https://cdn.sqhk.co/wuvukidovime/it6jijd/drive_in_cinema_birmingham_october.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457590/normal_5fcf789d9b0af.pdfIn PDF document text
    • https://cdn.sqhk.co/dubikureta/giajfhi/sega_retro_games_download_for_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459776/normal_5fe2422042a34.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454813/normal_5fe353fe8fe04.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4459318/normal_5fedaaf7da46c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486368/normal_5ff7d5b88db71.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479433/normal_5fc991a17a62a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4444113/normal_601a10855a068.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4479451/normal_5fffa25ac75d5.pdfIn PDF document text
    • https://texoxarisozitew.weebly.com/uploads/1/3/0/9/130969357/f7922.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d7bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7BB 5304 bytes
SHA-256: 629d167eedea139dbf6caa07989b5be1544f0ac5acaf93bef4d50fb84caf4bfa
font_01_sfnt_off0000e9ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9AE 10484 bytes
SHA-256: 26f61b73e2bc07595debf6dd3ecc1cbc951451c9186adecd0480898d9a968677

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