Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d7cdb212207ba5…

MALICIOUS

PDF

70.5 KB Created: 2021-03-03 13:38:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 885d1a89cce4c1dd2c651505e8671b85 SHA-1: 02f0db6daf9337d1a6470107beb7b3ee8a42572d SHA-256: c2d7cdb212207ba5896dd8c9c11dc6eb8ccc8657df44e0b7ad0791d0bd3566dd
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/wix?keyword=bloxorz+2+unblocked PDF link annotation
    • https://fidesafova.weebly.com/uploads/1/3/4/8/134876701/xotafula.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387924/normal_6035be01570d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426696/normal_601956dc00a39.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383704/normal_60368054eb88f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_603f49010cee4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426416/normal_5fde7275939dc.pdfIn PDF document text
    • http://labifovejes.mypressonline.com/takuvenedotezogofowo.pdfIn PDF document text
    • http://alcexpress1.xyz/the_lonely_shepherd_kill_billrdw2v.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388619/normal_5fc5ab25ad1db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4386076/normal_5feb59c39b0de.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485443/normal_5fcdc41cc0508.pdfIn PDF document text
    • http://romeital.space/dead_to_the_world_tour_blackbear_setlistz04kq.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404965/normal_5fe61890d3b37.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_off0000da0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA0A 5048 bytes
SHA-256: af5808ecc2513c54ae23c82a724a745ceb9033c0d33156213fc2b71f9e2a7d69
font_01_sfnt_off0000eb52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB52 10044 bytes
SHA-256: cdddbcbc4366554dfc52cd8586a9c40f2d33641a1315b461e943192f28fe5c68