Malicious PDF — malware analysis report

Static analysis result for SHA-256 321d83751deceaa4…

MALICIOUS

PDF

74.4 KB Created: 2021-02-12 20:44:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: f69ec99edfdd878713fc8038f80f7e55 SHA-1: 3d1ad5465377b822d3ce67782b4f7dfaecf00d71 SHA-256: 321d83751deceaa40be72566492a9de530d031ca7f739d5056c0d5acf1564f63
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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/wix?keyword=unblocked+game+websites+reddit In PDF document text
    • https://static.s123-cdn-static.com/uploads/4479445/normal_6006a5e8d13b8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4422371/normal_5ff6064ead03c.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4474988/normal_5fe5943424c57.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409796/normal_5fec1d84da639.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450039/normal_5fda916ae907c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486374/normal_5fd91a3001d3e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375690/normal_5fecccc552b0d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464078/normal_602234102d4ea.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4496153/normal_5fde9db3d97db.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387037/normal_601e273aa1c67.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/babetafaperaxov/the_interlopers_discussion_questions_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kijelopazekune/bridal_shower_invitation_templates_for_microsoft_word.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/38644348685.pdfIn PDF document text
    • https://s3.amazonaws.com/wanasuvedigo/18068431613.pdfIn PDF document text
    • https://s3.amazonaws.com/kafises/metformin_xr_500_weight_loss.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_off0000e4a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4A9 5544 bytes
SHA-256: 323a9a9ab3dd235b2264ba5e3a97ded25186cb3709c9856b985eb16776a68198
font_01_sfnt_off0000f781.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF781 10920 bytes
SHA-256: 7d200ce6837642cb6e89a357b9d47cf70f8ce21e3d6097631cf52eb6bfbc4663