Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3be77687a1d82a3…

MALICIOUS

PDF

71.3 KB Created: 2021-02-23 20:27:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 72ec620e7484506f2f919abef0a84cab SHA-1: 4e9212766716ede7eb29ce439c37830c03189841 SHA-256: c3be77687a1d82a3a5a5db1999663cec7f7b80da1824b7f6584c120c2e0a42ca
196 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
  • 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://baarspo.ru/wix?keyword=skyrim+blood%2527s+honor+speak+to+kodlak+bug PDF link annotation
    • https://cdn.sqhk.co/vulovosovem/ijedEjH/56211596784.pdfIn PDF document text
    • https://cdn.sqhk.co/lanasido/bUnihjg/91057324565.pdfIn PDF document text
    • http://yourlivehelp.com/zurobujun1uof0.pdfIn PDF document text
    • http://dontbeshy.xyz/how_to_find_angle_in_parallel_linesdp2ev.pdfIn PDF document text
    • http://7lessons.space/high_school_simulator_2017_weaponsx1556.pdfIn PDF document text
    • http://fredo.bike/rerufesapwfv0m.pdfIn PDF document text
    • https://cdn.sqhk.co/tavaxikanabu/agdslHh/phoenix_arizona_apartments.pdfIn PDF document text
    • https://cdn.sqhk.co/vorebilifi/jibgcjg/76052385642.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/cy1jijf/jajogamowipa.pdfIn PDF document text
    • https://cdn.sqhk.co/vuvupewog/ibjihgc/pound_cake_glaze_with_powdered_sugar.pdfIn PDF document text
    • https://cdn.sqhk.co/doxufojixene/9o9gf3u/color_street_nails_chateau_marble.pdfIn PDF document text
    • https://cdn.sqhk.co/pozedezupase/dnrhgJJ/78032343768.pdfIn PDF document text
    • https://fereganew.weebly.com/uploads/1/3/4/1/134131887/tebakugub_rosogiwazesewem.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/hcWjfPa/animal_shelters_hiring_near_me_at_14.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/g59Qr2H/awesome_tanks_2_hacked_unblocked_66.pdfIn PDF document text
    • https://cdn.sqhk.co/jasamomedam/hdwjbO6/64_bit_windows_10_pro_key.pdfIn PDF document text
    • http://steh-sistem.ru/rain_poncho_groundsheetfsxxx.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_off0000d9ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9FF 5816 bytes
SHA-256: bca0db784ea7e1251a98abe3a4f0a6fa0ccc61a9783c9bc836dd283ed689da2c
font_01_sfnt_off0000eda8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDA8 9972 bytes
SHA-256: c264e42ed95583e087d04a8bb17f5fdf8ccab315343a8e068adc3f7d641c5169

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