Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b01d560a165781d…

MALICIOUS

PDF

70.7 KB Created: 2021-06-05 15:30:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 0816d5f12d3501ee92b3ff0f9746a002 SHA-1: e38e7e0c16609a01334c53929068d30e1548b070 SHA-256: 5b01d560a165781dde9ec194a131b09e2cf744762390769f43891e266ba64492
186 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to disposable hosting services, indicating a link farm designed to distribute malicious content or phish for information. The presence of a URL like 'https://oniceh.ru/pbw?utm_term=serial+number+corel+draw+8' suggests a lure related to software serial numbers. The ML classifier and ClamAV detection strongly indicate malicious intent.

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://oniceh.ru/pbw?utm_term=serial+number+corel+draw+8 PDF link annotation
    • https://burufazifefep.weebly.com/uploads/1/3/4/5/134584298/623668.pdfIn PDF document text
    • https://juzapojoxop.weebly.com/uploads/1/3/4/3/134370352/392938.pdfIn PDF document text
    • https://fozanisatede.weebly.com/uploads/1/3/4/6/134691357/3970520.pdfIn PDF document text
    • https://jagaruwej.weebly.com/uploads/1/3/0/8/130874180/gosodaj.pdfIn PDF document text
    • https://lubagevaruzazej.weebly.com/uploads/1/3/2/7/132712663/doleminakibemap_loxikulukeruk_posomigis_xudatugunew.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://lakebimutep.pbworks.com/w/file/fetch/144427470/how_to_make_a_school_calendar_on_word.pdfIn PDF document text
    • http://luwivaj.pbworks.com/w/file/fetch/144506457/38068300890.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1e96c8f5-63e7-42b2-8ad2-6cfcbfa23ad5/descargar_biblia_reina_valera_1960_para_pc_gratis_en_espaol.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f3fa3f19-c998-43c8-a249-f2a8c99a24cd/florida_black_panther_life_cycle_diagram.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/35214585-c7f6-4a4c-b64b-0bdda9b8dba2/64910940928.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f32ba5f3-df1c-493a-818c-631990470c71/how_long_does_it_take_to_dehydrate_deer_meat_in_a_dehydrator.pdfIn PDF document text
    • http://pevozowo.pbworks.com/f/vogadeponazunovu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6a5032cd-10d8-4550-b6b5-ace5b15e3e22/acorde_piano_ebm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b50e565d-67d7-45f7-8a45-558ae9dc0fcc/30033690041.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9072518-f2eb-4cbc-853d-11b977bc340e/how_to_reset_clicker_wireless_keypad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7ab4cd68-1bd5-455b-8155-e60331f7bcf5/nawupumotararojinoju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3982766c-3973-427f-b334-8d8457d2e91d/wen_3920_scroll_saw_blades.pdfIn PDF document text
    • http://wuxikadafi.pbworks.com/f/xeradalimelewi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e21273e-510a-46a7-a0b4-388b8741d187/bible_for_dummies_free_download.pdfIn PDF document text
    • http://ziludezubeju.pbworks.com/f/properties_of_real_numbers_worksheet_grade_7.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_off0000d75b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD75B 5436 bytes
SHA-256: c50905e1152beee1d928355a90d89932100e31ee511a23c83903cf0b8e834c2b
font_01_sfnt_off0000e9cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CD 10664 bytes
SHA-256: 1284eed81db2ec73c1b393f036b02b67804ebd20f6fe86bc1635d0dbb49c94c1