Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b0503f95aafcad6…

MALICIOUS

PDF

76.9 KB Created: 2021-03-17 00:33:16 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 73d066ab849ea8718af2c261ff64c166 SHA-1: 9c7757d58e720446807a10c9e6644cdf4a74b41e SHA-256: 9b0503f95aafcad608efad4bcb36cdfbec6f55d1476e594395411bb008bf36b6
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://soxebez.ru/wix?keyword=direct+buried+cable+installation+guide+australia PDF link annotation
    • http://emirofficialzm.com/firefly_2016_setlistfxiwr.pdfIn PDF document text
    • https://xibigulekin.weebly.com/uploads/1/3/0/9/130968960/96c71a42bc050.pdfIn PDF document text
    • http://xozonline.ru/gopopiwulipufupexutq4yck.pdfIn PDF document text
    • https://xisuludibu.weebly.com/uploads/1/3/5/3/135300694/2612109.pdfIn PDF document text
    • https://wikefazopikevi.weebly.com/uploads/1/3/4/7/134715570/8242154.pdfIn PDF document text
    • https://nabaladeso.weebly.com/uploads/1/3/1/4/131438379/d23b592a8c.pdfIn PDF document text
    • https://resivoviwogo.weebly.com/uploads/1/3/3/9/133987135/xigaxo.pdfIn PDF document text
    • http://study-english-04.space/terzaghis_bearing_capacity_equation_adalah8cxvw.pdfIn PDF document text
    • http://freud.icu/fetiwemudib1slni.pdfIn PDF document text
    • https://sizeduxaginota.weebly.com/uploads/1/3/2/7/132712537/bulel-juditojij-fojogape.pdfIn PDF document text
    • https://tujiwukof.weebly.com/uploads/1/3/4/5/134592642/34371d3b4db020e.pdfIn PDF document text
    • http://zagavogafewakud.iblogger.org/how_to_use_apple_cider_vinegar_to_cleanse_scalp.pdfIn PDF document text
    • http://heleogose.online/lokodedomzicdz.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://2c91b947-1dd8-401e-ae91-d595f2f75867.filesusr.com/ugd/0af078_404513e021e44a6c9b65280788c99429.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/29b05f3d-af83-4401-a61c-2b66d6ee280d/how_to_get_into_digital_photography.pdfIn PDF document text
    • http://rabuwupitakif.rf.gd/33721620187.pdfIn PDF document text
    • http://merekum.rf.gd/27994310503.pdfIn PDF document text
    • https://21d44941-995c-48b9-956b-8145330e20d5.filesusr.com/ugd/577b75_26e9e098cce445a0a620d8d27b285bd5.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/968ff7fe-d12d-4cb2-97ba-1592409f9b2f/how_to_pair_bluetooth_headphones_to_lg_tv.pdfIn PDF document text
    • https://8a5a474a-a671-4857-921d-d1df0ee72544.filesusr.com/ugd/523716_024a9c55e7be4f15bf2703e098b47206.pdf?index=trueIn PDF document text
    • https://1c514d3f-4aca-4c14-a2cc-94ef866bc6c7.filesusr.com/ugd/860217_7abce2b68c2e4aeba78e8aae92cb8d9e.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd801bc-76ef-4c71-95b5-446f46d393b2/how_to_get_the_code_for_honda_odyssey_radio.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95182e69-e672-450d-8a24-320f337ed053/aprendizajes_clave_preescolar_lenguaje_y_comunicacion.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_off0000f0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0E3 5248 bytes
SHA-256: 2462b6b1ee702d9b1b5ba42daade0a3c69614b9e1f2358d5d6a3a5e53d7a23a8
font_01_sfnt_off000102c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102C3 10320 bytes
SHA-256: 1c0ea2331a408b404eefeaf70dfc5631465a5bdc683a571b014b71b759c35531