Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7ff7c4e62d0de7d…

MALICIOUS

PDF

92.4 KB Created: 2021-05-17 12:29:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 4a142ff12d96af2fb56476d2b70b21fc SHA-1: 25b54b845dd232e4c8d1a66cd73dfefc229326ef SHA-256: c7ff7c4e62d0de7d8493f8fdbfd8b03b76e0e3807602f3cf6897ac98d298099b
126 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The document contains multiple embedded URLs, with one specifically pointing to 'jumiwimov.ru' and a query parameter suggesting a lure related to educational content. The presence of numerous links and disposable hosting, as flagged by PDF_SEO_DISPOSABLE_LINK_FARM, further supports a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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 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://jumiwimov.ru/strik?utm_term=bloom%2527s+taxonomy+powerpoint+for+teachers PDF link annotation
    • http://vumexovuvelafe.medianewsonline.com/thompson_center_hawken_discontinued.pdfIn PDF document text
    • http://zarudofafibitov.mywebcommunity.org/through_bill_of_lading.pdfIn PDF document text
    • https://cdn.sqhk.co/molewekane/hhejcje/zimukuf.pdfIn PDF document text
    • https://cdn.sqhk.co/redodadix/m3xQyzW/windows_media_player_win_8.pdfIn PDF document text
    • http://rejemezurufoveg.mywebcommunity.org/xowul.pdfIn PDF document text
    • http://jogajep.medianewsonline.com/12157845642.pdfIn PDF document text
    • http://pobunav.sportsontheweb.net/74801966425.pdfIn PDF document text
    • http://bobositufunoto.iblogger.org/bosch_logixx_7_integrated_washing_machine_manual.pdfIn PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In 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/b19910e0-c1a4-492d-b6e5-927438f7aa26/gabexibujuzusarile.pdfIn PDF document text
    • https://0efdb04f-128a-4c0d-ace4-8b312723ebcc.filesusr.com/ugd/5508f4_36b88eef881b45eab3dc37f3b33a3d46.pdf?index=trueIn PDF document text
    • http://lulasiwafa.rf.gd/vipoxo.pdfIn PDF document text
    • http://vazalavowudepip.epizy.com/bepata.pdfIn PDF document text
    • https://ac685e6e-6442-44c0-91a1-b3a367e79ef2.filesusr.com/ugd/ce77c6_d4b43cb4599e4c449aa4e665d49defad.pdf?index=trueIn PDF document text
    • https://c948e902-2437-43f3-9f1e-7aaad30688a7.filesusr.com/ugd/464a75_118bc15d500145e2bb023a5a00f73b68.pdf?index=trueIn PDF document text
    • https://9c3086b9-336b-4a4d-b39c-975a2563a2e0.filesusr.com/ugd/f4f792_8124b21ed8eb419580e6bf67a5848eba.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/482115f1-b8f8-40e5-b53b-0d7918e7697b/dell_inspiron_n7110_price.pdfIn PDF document text
    • https://ba85394b-11ac-4ca4-926b-74ca936c52e1.filesusr.com/ugd/5ccfc8_91e246954bc542c782afac101e0bbfee.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/9957c124-5c2b-4592-a4d8-efff3807176d/90650744391.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31feb10a-e658-414a-9259-faac5b641529/kitchenaid_artisan_mixer_5_qt_sale.pdfIn PDF document text
    • https://2386e270-bd20-42c1-b3e5-1ba7eaa1d68d.filesusr.com/ugd/b4f0c6_9152cd59cca3484dba7ccdbb786f5adb.pdf?index=trueIn PDF document text
    • http://nigaxatu.rf.gd/rotulamexowimirimusaseb.pdfIn PDF document text
    • https://b3a1a1c9-4f8f-4fb8-b7cc-7339030cc889.filesusr.com/ugd/162fe6_2f247731c2b34584928641a0364434aa.pdf?index=trueIn PDF document text
    • http://xupewosupegosax.epizy.com/pefuraja.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_off000122cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122CD 1696 bytes
SHA-256: 0727529401fe802ed9d02ac4b3bed84f53da9d0a5838f1dab7fe2f7579417e88
font_01_sfnt_off00012af7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AF7 5600 bytes
SHA-256: 5a36992f418dd7e598b51674ec9ed151a10509ab36bfccd4098783eade71cb12
font_02_sfnt_off00013dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13DFB 11032 bytes
SHA-256: 413ae10119af6ca0d8e467e2b5b8c415aab7334a600c53865a0b06772eaa483b