Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbf6adb852b806cf…

MALICIOUS

PDF

68.4 KB Created: 2021-03-05 00:52:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 154afc6798a95d22c66d9ef3c8d6180b SHA-1: 8a9be92cc8208bd813dc7338cb76037768737c95 SHA-256: cbf6adb852b806cf985b4e84bce77de8312ba4d50b025b09dc75f677ab682e9b
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • 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.
  • 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://ponafet.ru/wix?keyword=earth%2527s+interior+structure+worksheet+answer+key PDF link annotation
    • http://juzufezike.mygamesonline.org/brother_xr3774_tension.pdfIn PDF document text
    • https://cdn.sqhk.co/lepavenujal/Oijzijr/retrowave_wallpaper_phone.pdfIn PDF document text
    • https://losebevaxefot.weebly.com/uploads/1/3/5/3/135347065/ponat-januvikeboxi-wajijatusamo-kozizipa.pdfIn PDF document text
    • http://vikiduxa.mywebcommunity.org/redneck_manifesto_imdb.pdfIn PDF document text
    • http://mamefumiwuto.mywebcommunity.org/65086537168.pdfIn PDF document text
    • https://cdn.sqhk.co/zojixemem/yggg7Nx/17481470356.pdfIn PDF document text
    • https://cdn.sqhk.co/rubekafux/j0T0Pif/52971845198.pdfIn PDF document text
    • https://sugulidan.weebly.com/uploads/1/3/4/5/134508933/8463655.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zagopemolal.rf.gd/what_channel_is_peoples_choice_awards_2020_on_dish.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c470891a-b7fa-4c06-b90c-e62110edc248/suxag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7a950a6e-33a7-4af4-bfe8-e5015af5f1c3/typical_isentropic_efficiency_of_turbine.pdfIn PDF document text
    • https://354df738-7a8c-4643-bdcd-aa58f7c4bd0c.filesusr.com/ugd/69cf62_b97e49135a924328a6cc85405b0a2d8f.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/86d8ff62-7a44-4638-ac86-1e48b8216372/dell_24_ultra_hd_4k_monitor_p2415q_specs.pdfIn PDF document text
    • http://satonavuka.rf.gd/vewunakavuk.pdfIn PDF document text
    • https://a8a2d6b8-6248-42a0-90a4-e25e421c2e59.filesusr.com/ugd/f63f29_d3970eea7f8945a0a628cd0122abb567.pdf?index=trueIn PDF document text
    • https://ebba3e40-d49f-4cc8-b137-373bb1124918.filesusr.com/ugd/384ea4_a2bab655771e4ae8acf8573f6acb0808.pdf?index=trueIn PDF document text
    • https://63b1f34b-4847-450f-8d9a-4788d10e1cf5.filesusr.com/ugd/451a43_3d8b21dfce8d4bc28fd318a02d3d0406.pdf?index=trueIn PDF document text
    • https://59cf682b-6680-4a08-8b8d-0472bab64ef7.filesusr.com/ugd/d7d6cd_b8bdb299b7df434e94ce83e7d1ac4aaa.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_off0000cffd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFFD 5104 bytes
SHA-256: 1e44ed04ce33a8fd91efa459a2e0467484b32a1e733024e734cd02e7beb96876
font_01_sfnt_off0000e178.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE178 10104 bytes
SHA-256: 905582db74dffe04f09b3c9b9b3fcaa749a01e6b013cfcea25f78b1678840248