Malicious PDF — malware analysis report

Static analysis result for SHA-256 cef634d2c81a2442…

MALICIOUS

PDF

71.3 KB Created: 2021-02-27 07:36:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 966f35f95bcc7301ea4711922666c421 SHA-1: 4a7bbb1704f3d40e8f1effc51158dccdca2fb056 SHA-256: cef634d2c81a2442ec56d8728339ba07165523f27c6fa1b957543e3d5f317f20
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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/wix?keyword=graco+comfy+cove+dlx+swing In PDF document text
    • http://mosebuzixat.mywebcommunity.org/92611562620.pdfIn PDF document text
    • http://pofuxubilet.sportsontheweb.net/how_to_thread_bobbin_singer_confidence_quilter.pdfIn PDF document text
    • https://jerupixudenaxi.weebly.com/uploads/1/3/1/4/131437293/6557520.pdfIn PDF document text
    • http://kamikofonem.mygamesonline.org/7210076329.pdfIn PDF document text
    • https://cdn.sqhk.co/gabadifofibo/hjfZngj/98233243551.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4457302/normal_5fcd3642c52f4.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413714/normal_5ffd09c148227.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4476418/normal_5ff691f2bec27.pdfIn PDF document text
    • https://nagipabusodeza.weebly.com/uploads/1/3/1/4/131453106/jejiwanujixodo_pekutus_nilepigipi.pdfIn PDF document text
    • http://xemizawufogutuf.scienceontheweb.net/suzuki_sidekick_4x4_for_sale.pdfIn PDF document text
    • https://cdn.sqhk.co/liripudeb/ajjhdie/mufoxepalaruvanuga.pdfIn PDF document text
    • https://xuvakaxatal.weebly.com/uploads/1/3/1/0/131070170/4564028.pdfIn PDF document text
    • http://zugemenelil.medianewsonline.com/63296889162.pdfIn PDF document text
    • https://cdn.sqhk.co/zolulesar/s9hjUxZ/ecostar_led_remote_control_app.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/fewunadupop/84698724792.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/kepepejinere.pdfIn PDF document text
    • https://s3.amazonaws.com/votubukaxogilix/gupomomizunedo.pdfIn PDF document text
    • http://wolobugoxew.myartsonline.com/words_their_way_spelling_inventory.pdfIn PDF document text
    • http://sitafefisoju.atwebpages.com/zujelibikilisigogamolaw.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cce5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE5 5404 bytes
SHA-256: 00b5bc269f6298d847200aeb8bc5e3a4ac61a6124c5e0623045646b1c3165b04
font_01_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 10156 bytes
SHA-256: 00227f1196d29f1eb95a07628a7a834396e6957462e1470b22cecca9dfa89777
font_02_sfnt_off0001021c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1021C 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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