Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac8aa680fd9eaf89…

MALICIOUS

PDF

64.5 KB Created: 2021-02-22 10:12:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 4e2f5ed219fb3e9cfba43592b08f8bad SHA-1: b1fa0557c70ab42f03f61a5465a28b60aac606a7 SHA-256: ac8aa680fd9eaf89f27c9103e444743585213b45a21dcdc3517497f0f4551983
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://jottigo.ru/wix?keyword=south+orange+softball+complex PDF link annotation
    • https://voteriboxovoviv.weebly.com/uploads/1/3/4/3/134352377/jefesatek-zifanuzirelit-fasuv-neladekezumumip.pdfIn PDF document text
    • http://pornbustyvids.com/dotizgow30.pdfIn PDF document text
    • https://nopeludaseji.weebly.com/uploads/1/3/3/9/133986928/998583.pdfIn PDF document text
    • https://fimekubolutad.weebly.com/uploads/1/3/4/5/134585071/23994ab8e408.pdfIn PDF document text
    • https://jidakizunulub.weebly.com/uploads/1/3/1/3/131381167/sotakuzoxuf.pdfIn PDF document text
    • http://ijmalan.xyz/viginulesorusebofopukamo4yag8.pdfIn PDF document text
    • http://minuette.me/wow_legion_mistweaver_monk_pvp_guidepd33x.pdfIn PDF document text
    • https://cdn.sqhk.co/lisupixiwe/bijJndv/download_truck_driver_cargo_mod_apk_unlimited_money.pdfIn PDF document text
    • https://sewusadata.weebly.com/uploads/1/3/5/4/135401056/8540421.pdfIn PDF document text
    • http://termometr-medikal.site/kejapadojaxaxudufosiparcsb51.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/zemunomipazikez/apeman_a77_manuale_italiano.pdfIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/bts_mama_video_songs.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/deforestation_in_india.pdfIn PDF document text
    • https://s3.amazonaws.com/gagagakigibapo/gulalip.pdfIn PDF document text
    • https://s3.amazonaws.com/zaxawetawupo/fallout_76_weapon_mods_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/xabalaru/contemplate_ngha_l_g.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/tricky_maths_questions_and_answers_in_hindi.pdfIn PDF document text
    • https://s3.amazonaws.com/fosagoba/79349279010.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_off0000bd5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD5B 5740 bytes
SHA-256: e015b02aa29cdc6106fc2caa18920b3535ff202cad7d28d5299c9cfaaf22be05
font_01_sfnt_off0000d0c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0C6 10864 bytes
SHA-256: df13e0f5d6fad8ecc6cda23d38fa620e98c3f4161da783073336afa097f32623

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