Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfc162efc33cd9ad…

MALICIOUS

PDF

70.8 KB Created: 2021-02-28 08:16:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: ba9495b5cead60fa028b07bf36d43262 SHA-1: ddea46a70fd04e0dada45187324cde1c0046d6e0 SHA-256: cfc162efc33cd9add8d2caa11e5888ea9ca9f06ef668148e7c984a81e7ab20c1
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://xajibur.ru/wix?keyword=earthworm+lab+worksheet PDF link annotation
    • https://sazunanu.weebly.com/uploads/1/3/4/5/134596286/malejasejoju-duwabisojupi-subaduf.pdfIn PDF document text
    • https://cdn.sqhk.co/fagiseregu/ghdXSjb/pilot_g2_pens._38.pdfIn PDF document text
    • https://vamarimorojikav.weebly.com/uploads/1/3/4/6/134640123/todimazi.pdfIn PDF document text
    • http://peuly.xyz/john_watson_behaviorism_theory24wr7.pdfIn PDF document text
    • http://mnogoturov.com/toyota_corolla_android_carplayspq32.pdfIn PDF document text
    • http://choosenews.space/77976348192z0vwt.pdfIn PDF document text
    • https://cdn.sqhk.co/bapisolel/fJ10u9v/brawl_troopers_apk_mod.pdfIn PDF document text
    • http://logvoz.ru/wunijutovsbh1c.pdfIn PDF document text
    • https://cdn.sqhk.co/votezevon/hiQgijc/fevilopefogutojagi.pdfIn PDF document text
    • https://waperimawomexav.weebly.com/uploads/1/3/4/7/134733778/zikurisikofojugidox.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/garorowa/sozijexov.pdfIn PDF document text
    • https://s3.amazonaws.com/zesotat/dpannage_informatique_chalon_sur_saone.pdfIn PDF document text
    • https://s3.amazonaws.com/gekojulog/hotstar_for_pc_windows_10_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/jukoxisojow/a_bug_s_life_action_game_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/pewebopufupe/eulogy_templates_for_dad.pdfIn PDF document text
    • https://s3.amazonaws.com/nazekisigiduz/android_tv_malaysia_app.pdfIn PDF document text
    • https://s3.amazonaws.com/kufazete/bifelisevilidow.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/ijca_journal_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_off0000d939.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD939 5176 bytes
SHA-256: 4bf5cf29fc175cc03df07496725952ce9e3fd5c0c85cc69414b508f90681b8d5
font_01_sfnt_off0000eabd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEABD 10596 bytes
SHA-256: ed73cbf0e2b6bb208f60a99834c859649b0df0b3407efe9f26c93c94a37000ed