Malicious PDF — malware analysis report

Static analysis result for SHA-256 98359af2e4db20b3…

MALICIOUS

PDF

71.4 KB Created: 2021-02-24 18:33:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: 7d55eef77be654c9523f3626816391d9 SHA-1: f16797a6d50d74a46b0da555a0a3cdb7e179bdff SHA-256: 98359af2e4db20b34fa5a1597056f9f17f50b4dad15dee1b857dfab2455c6d84
196 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jacksth.ru/wix?keyword=instructional+fair+inc+chemistry+if8766+answers PDF link annotation
    • http://geesecam.com/murder_mystery_dinner_party_kit_for_10glv4p.pdfIn PDF document text
    • http://iminn.ru/ibm_rational_doors_9._6_user_manual64z59.pdfIn PDF document text
    • https://ledunadexaw.weebly.com/uploads/1/3/0/7/130775166/fedurajomunezibe.pdfIn PDF document text
    • http://tikovg.xyz/how_to_cite_an_online_news_article_apa_stylefeusn.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/zukogi/cinema_4d_studio_r20.pdfIn PDF document text
    • https://s3.amazonaws.com/rimepusox/kitefefuwixibej.pdfIn PDF document text
    • https://s3.amazonaws.com/desekusoxi/azure_api_management_developer_portal_templates.pdfIn PDF document text
    • https://s3.amazonaws.com/fapaga/backdrops_pro_unlocked_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/jujadodedaruxix/conversation_question_answer_for_class_6.pdfIn PDF document text
    • https://s3.amazonaws.com/bopuxosavubare/bow_tie_noodles_and_sausage.pdfIn PDF document text
    • https://s3.amazonaws.com/fomaralunex/emulator_android_yang_ringan_untuk_pc.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/cheat_india_movie_all_songs_free.pdfIn PDF document text
    • https://s3.amazonaws.com/fotepopunaj/the_fast_metabolism_diet_recipes_phase_3.pdfIn PDF document text
    • http://koxirekal.epizy.com/tiforodubanomamomufu.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/molorum.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_off0000d9ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9CA 5680 bytes
SHA-256: 2ffff304642e68c0a14ba435a0606332f27bee22b678ed597b34c213da20ce66
font_01_sfnt_off0000ed12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED12 10416 bytes
SHA-256: 7a7d4e70168b05dbfc52ca2040039cfed94a8a39ea6df1667ef5719db2444692