Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad1041720cff349d…

MALICIOUS

PDF

78.5 KB Created: 2021-03-10 07:49:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: f8016492d61a2b62b98b750bec03eccc SHA-1: 1c6c81cd2e51695b84375afc5f16ae4a0a89ed0f SHA-256: ad1041720cff349d5b3daf03e31eb4353cd1de19d353623cf803c3ee929f4f1f
184 Risk Score

Malware Insights

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

This PDF document contains embedded links that redirect to known malicious infrastructure, specifically identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The primary malicious URL observed is 'https://yafferge.ru/strik?utm_term=the+tempest+by+william+shakespeare+full+movie+in+hindi', which is presented as a lure for movie search results. The document's structure and link farm characteristics suggest a phishing or redirection campaign, likely intended to deliver a secondary payload or lead the user to a credential harvesting page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://yafferge.ru/strik?utm_term=the+tempest+by+william+shakespeare+full+movie+in+hindi In PDF document text
    • http://rezotu.xyz/gregarious_root_wordxrfp1.pdfIn PDF document text
    • http://ashotik.space/6486631715349lj9.pdfIn PDF document text
    • http://firstflirts.site/code_with_javascript_for_dummies_review_checklistal2wr.pdfIn PDF document text
    • https://walagewujiw.weebly.com/uploads/1/3/0/9/130968979/ledunimew.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379043/normal_5fe607aadd5ee.pdfIn PDF document text
    • https://getazaxebu.weebly.com/uploads/1/3/4/8/134866961/4292372.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374839/normal_601f24bdbb099.pdfIn PDF document text
    • https://duvupobilalef.weebly.com/uploads/1/3/4/6/134630448/kuvon_sadoboveposejep_gagemajumogujen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463277/normal_60396b9b91e4d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392439/normal_60066c53d3c79.pdfIn PDF document text
    • http://umniashka.ru/fingerprints_of_the_gods_the_quest_continuesd3t25.pdfIn PDF document text
    • https://jaduxopedarev.weebly.com/uploads/1/3/4/7/134749363/fec0415e.pdfIn PDF document text
    • http://foxiduwanati.mygamesonline.org/computer_definition_computer_science.pdfIn PDF document text
    • http://livemavuxedu.getenjoyment.net/dd_wrt_router_login.pdfIn PDF document text
    • https://samabuwe.weebly.com/uploads/1/3/0/7/130739499/281606.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/df19e9c3-0375-440e-afc7-cc4c96a4190b/rademivokexubivuzosuzufaw.pdfIn PDF document text
    • http://pelebirepopo.onlinewebshop.net/when_you_share_a_memory_on_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b46e0163-36f7-41f9-b84c-5c58373bd748/gusapituvule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bad040b3-f6b3-4192-8a70-ce1ab85964ef/can_you_still_get_black_ice_skins_2020.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d5d7d7-3f81-44ff-a07a-7f46f63abf17/razegupodosogejobut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9b6e166-0de6-4377-8202-dc22c8adc91a/what_are_brittle_stars.pdfIn PDF document text
    • https://a121017b-3fb3-450c-9156-48dd71a9bf80.filesusr.com/ugd/07625c_4d5ebdc2ceaf473b812752d762bc500c.pdf?index=trueIn PDF document text
    • https://95a57b4d-a24c-4412-bd87-88f4f885d252.filesusr.com/ugd/011e4b_fb800163688a448a979b6e4e5182458f.pdf?index=trueIn PDF document text
    • https://5d3a3edc-1384-4eb0-a354-174dd54c13aa.filesusr.com/ugd/7f5dc5_013649e802d44e948cc5e0bac9c677cc.pdf?index=trueIn 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_off0000f6d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6D2 5688 bytes
SHA-256: 1a9c30d1f5511e28d12ba813e537e3ac428cebc404e85c2fcbab5ebff34b2bbb
font_01_sfnt_off00010a12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A12 9836 bytes
SHA-256: eae88038baef95fc078a1da5c9000ef8c7c97906fd99346d73db0d1b7e9f8050

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