Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2dd794543d84fe2…

MALICIOUS

PDF

110.9 KB Created: 2021-04-04 14:45:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 95940a646d4783261b40491c7aba2e48 SHA-1: 505eb09d17816744e647c4b3993e0c1e85e25032 SHA-256: c2dd794543d84fe26f5c7d9f2826d35408cc330ea3eac41d0ab4ba8e6644b99a
156 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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.
  • 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=tipo+de+lenguajes PDF link annotation
    • http://gidujoluj.mypressonline.com/bible_quiz_on_luke_chapter_by_chapter_in_telugu.pdfIn PDF document text
    • http://midesamipazizuj.scienceontheweb.net/barron_s_6_gre_practice_tests_2nd_edition_textbook.pdfIn PDF document text
    • http://towexiwi.sportsontheweb.net/29521477463.pdfIn PDF document text
    • http://polobasopika.mywebcommunity.org/ncert_biology_objective_questions.pdfIn PDF document text
    • http://kesisofawa.mygamesonline.org/70919164557.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/e31fbc63-1c0a-40e8-85fa-5793ec3a517d/77117398257.pdfIn PDF document text
    • https://a24bc4ef-4ee2-4fae-af0c-c9fea810b245.filesusr.com/ugd/67d96c_f3df7a42fe7f4fedad044ae9dbb85721.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tokatefozude/fanuxepis.pdfIn PDF document text
    • https://s3.amazonaws.com/xeruxaxer/bw_formation_wedge_test.pdfIn PDF document text
    • https://dbba0f06-1911-40f0-8c80-a2638c7f81cc.filesusr.com/ugd/b13fd1_aad7ac90663e44f7949d8260f1c4b811.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/pomaxa/nufuru.pdfIn PDF document text
    • https://s3.amazonaws.com/xalexojaxipud/41297589738.pdfIn PDF document text
    • https://s3.amazonaws.com/vovuzize/kti_abortus_inkomplit.pdfIn PDF document text
    • https://s3.amazonaws.com/wonumafubij/mexodizivevemaxabu.pdfIn PDF document text
    • https://e1cf253b-b3af-4135-a675-1c3c021177f9.filesusr.com/ugd/111c46_54ef17195d9b47ff9deaecbed1245620.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/naxozelozude/astronomy_magazine_april_2018.pdfIn PDF document text
    • http://pimoxonevuwewax.atwebpages.com/biscuit_business_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/jozaponi/data_acquisition_toolbox_user_s_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0a12476-6409-4a91-a2d5-99ba149452ea/fiwidemisorodo.pdfIn PDF document text
    • https://3633ae4e-9acc-45df-885e-1bfa1481cb44.filesusr.com/ugd/e73054_a775adaafd7c4bbfbf4e8fe13f61cc87.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/jolozidabi/74870726919.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_off000170c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x170C9 5056 bytes
SHA-256: 95cfb34986017406699b969f677aa9032d70676f1e28cc405561d51dcf603ba5
font_01_sfnt_off00018218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18218 13252 bytes
SHA-256: 693cf4d776194a91371bf5cab6853a80c97eac30f1cfa3c1a22c90afa7646e78

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