Malicious PDF — malware analysis report

Static analysis result for SHA-256 96c81db2b22c4f37…

MALICIOUS

PDF

72.3 KB Created: 2021-02-13 19:09:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2371be8b189230cb001def87e8567af4 SHA-1: 969a5e6502eaa96f1fcdd4f1eec31837ab201a9b SHA-256: 96c81db2b22c4f3717cd69c4d8230ee72b778d0013aa279fb34a730fbb1ae624
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=chapter+3+answers PDF link annotation
    • https://cdn.sqhk.co/lukumuzu/e7gdyjj/84229127926.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468831/normal_60135b0ba7c0c.pdfIn PDF document text
    • https://marizezibafive.weebly.com/uploads/1/3/4/8/134865590/golibiwojigupet-wazogax.pdfIn PDF document text
    • https://jazawimap.weebly.com/uploads/1/3/5/3/135346256/laxatabavotoz.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/ijkyOsP/shattered_glass_movie_review.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/Mhjhbhg/wifi_analyzer_mac_os_x_free.pdfIn PDF document text
    • https://duzopotubesafes.weebly.com/uploads/1/3/4/8/134890215/3113512.pdfIn PDF document text
    • https://cdn.sqhk.co/vizakifito/Ml6wqje/sevetunenavopolenemul.pdfIn PDF document text
    • https://cdn.sqhk.co/pekotegafod/iiehhgh/2467737636.pdfIn PDF document text
    • https://cdn.sqhk.co/buzulexoxuve/dEihqgi/calimoto_motorcycle_rides_offline_gps_android.pdfIn PDF document text
    • https://cdn.sqhk.co/zipodumup/b1kcfii/cheat_codes_for_sims_4_university.pdfIn PDF document text
    • https://cdn.sqhk.co/guwaloxipete/pjhRicB/12032907371.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/gjagd9V/kitizenef.pdfIn PDF document text
    • https://cdn.sqhk.co/lezebulodiw/XOuAPWz/juberazotokoxamaga.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/vikukinumet/rarabugutafolunuxalu.pdfIn PDF document text
    • https://s3.amazonaws.com/jeponowon/bafatilur.pdfIn PDF document text
    • https://s3.amazonaws.com/dumupa/87477727036.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_off0000e0aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0AA 5036 bytes
SHA-256: 5d5ab3075c8d460b6f632268964b9f0856ff74e518bc79c668635186bf7fd269
font_01_sfnt_off0000f1cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1CD 10196 bytes
SHA-256: f14db8dcc67fec7e494fa584255bb6273ba574f3aa12a141b6a652dc9898a47d

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