Malicious PDF — malware analysis report

Static analysis result for SHA-256 221809c5728fc383…

MALICIOUS

PDF

73.0 KB Created: 2021-03-01 12:10:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 63f64fe5fb7a746903cd7c05dfbe9e88 SHA-1: 6ddc6028ebf9574835c4672090937e3f77708714 SHA-256: 221809c5728fc383ca3ce438a48c46c021ff1b0cc381ff17222f60c13ffcc46e
254 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
  • 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://yafferge.ru/award?keyword=henry+morris+study+bible+imitation+leather In PDF document text
    • https://pudijamarotu.weebly.com/uploads/1/3/4/0/134000536/67a060d.pdfIn PDF document text
    • https://sedidumorasu.weebly.com/uploads/1/3/4/5/134507492/makojurifas.pdfIn PDF document text
    • http://help-violation.com/ros_kinetic_install_gazebo_9hlz5n.pdfIn PDF document text
    • https://tonewebebajuja.weebly.com/uploads/1/3/5/3/135319275/e6e3dc370b.pdfIn PDF document text
    • https://sozuleku.weebly.com/uploads/1/3/5/9/135962343/vafalakitivawatoxomi.pdfIn PDF document text
    • http://service-hire.com/hero_xtreme_160r_price_in_nepal329cs.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/petuzutemixuvod/animal_farm_chapter_2_study_guide_answers.pdfIn PDF document text
    • https://s3.amazonaws.com/kisagoz/lagu_kau_belahan_jiwaku.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/bts_love_yourself_answer_e.pdfIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/sunapabivebininuvitekubod.pdfIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/dnd_homebrew_class_template.pdfIn PDF document text
    • https://s3.amazonaws.com/vebenok/dowuwetil.pdfIn PDF document text
    • https://s3.amazonaws.com/xunilukegez/national_registration_identity_card_ww2_template.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_off0000e1ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1FF 5268 bytes
SHA-256: da05c7b9f4ad943cb303f311c3b93eca938975adaaca42d041d1da814eaebbbe
font_01_sfnt_off0000f3b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B8 10236 bytes
SHA-256: d5c15fc747590d1050d1cbe5427571fbdb63ceb8c7c35c78be20fff473159ea8