Malicious PDF — malware analysis report

Static analysis result for SHA-256 520625c5af600c8c…

MALICIOUS

PDF

72.9 KB Created: 2021-02-26 01:47:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: cf08da5820d435d1113b3e7a692c6e35 SHA-1: 915eb8dc836e6b1682a5b5577a39cb5a7b3066ac SHA-256: 520625c5af600c8c65eea993199af4c6e183f87fb5e6caf740b30ed6e5ca6805
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • 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://druttle.ru/wb?keyword=how%20to%20install%20britax%20clicktight%20forward%20facing PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4486550/normal_6030f6f2a4f72.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409114/normal_5fe5a199020bc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366341/normal_601dbdc811753.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_600f8ca44a45a.pdfIn PDF document text
    • https://muwirejevom.weebly.com/uploads/1/3/1/8/131857435/7595071.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4463824/normal_6000f2d24e2f9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412761/normal_60185bb7c7a9f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368756/normal_601ef2becf594.pdfIn PDF document text
    • http://teaitalis.space/aadukalam_full_movie_hd_videooynyg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4473052/normal_5fcf7e202494c.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/vavapekadoliti/ginolimulu.pdfIn PDF document text
    • https://s3.amazonaws.com/wekibik/dozoxafusosiwakimul.pdfIn PDF document text
    • https://s3.amazonaws.com/juzinaramip/68313184712.pdfIn PDF document text
    • https://s3.amazonaws.com/pizexopenaxu/12908076690.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/wogugubobu.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_off0000dd55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD55 5608 bytes
SHA-256: 7420cfb70e5d2fefe7a864416d345e5eb802fae80b7823b206cd86e310f34aaf
font_01_sfnt_off0000f074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF074 11208 bytes
SHA-256: 1279aae7bc085984953c5e3ad519222be497c4e9fabf1871e8904651d49aaeda