Malicious PDF — malware analysis report

Static analysis result for SHA-256 46c0fd868dd99a09…

MALICIOUS

PDF

69.8 KB Created: 2021-06-01 04:12:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: ef7f532baa4e9a19d29358e00b665b1d SHA-1: 7567c5e68a68280f21337f7bf643d7947ed10195 SHA-256: 46c0fd868dd99a09100372393e35226138c02544290ecea521191fb28ce51c55
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, with the heuristic 'PDF_SEO_LINK_FARM' indicating a potential link farm. One of the primary external URIs, 'https://philabc.ru/pbw?utm_term=count+by+7s', is flagged as suspicious. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the structure points to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://philabc.ru/pbw?utm_term=count+by+7s PDF link annotation
    • https://kevugekakizuxo.weebly.com/uploads/1/3/4/4/134481001/f4f6e354f69.pdfIn PDF document text
    • https://poteboxamakimef.weebly.com/uploads/1/3/4/3/134325651/5461166.pdfIn PDF document text
    • https://ruvawigalovenu.weebly.com/uploads/1/3/4/3/134318686/xunuworexu.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/ea7882e4-7451-4a9d-baef-22c481050471/fupexutinujigo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/98362bda-8604-4ca8-a9e0-19205651b279/59789844236.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/72c05f6f-84f5-47cf-86a6-8623d167ffec/the_couple_next_door_novel_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fe57301-e68a-4bc4-94c7-0be419b9699e/la_bella_ceci_y_el_imprudente_cap_27.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/089394f4-36ca-471c-9592-0f73ea7090af/como_descargar_el_juego_de_crash_bandicoot_1_para_android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6b03872b-d22c-4059-8d62-ab66b6962227/ritimeta.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c3ce1b70-3f23-4469-aaf5-8d0b822e7f4e/zitex.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d335b380-f1fa-48c5-bb13-46e8513484ae/camera_raw_13_for_mac.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aeb97f0b-e2e7-44c1-bf60-6f51b75a42c6/gusezokatotetulitojotabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9ccd87b-4b3a-48b7-be37-a3349e725b83/buscarv_con_coincidir_excel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9c90c784-7ec1-4095-9909-711594de5a59/zuxokapadezovowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a60f3eb6-0ed6-40e1-88b1-f653e03c80c2/zenelotidinuwisijufigeb.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/14464a5e-f114-491e-a167-46b105a487cb/where_to_drop_off_used_clothes_winnipeg.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40e32a7a-cfe3-42b7-9b25-658449e99dc5/the_three_billy_goats_gruff_big_book.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/215b9718-55b9-42a7-a306-8f815303a717/58036417284.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a3f389d4-cddb-49c1-abb6-69ae0f1311bd/sugazogukokuxovesarizud.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_off0000d577.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD577 4568 bytes
SHA-256: 05071fb2f7b413a808159903af7a67a5bdba629453301dd82ff606e568d88c88
font_01_sfnt_off0000e524.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE524 11000 bytes
SHA-256: 87f2deb312cd395a8cd5bf7299c2c0f50437a476963321c8194f9ab5d0feb54a

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