Malicious PDF — malware analysis report

Static analysis result for SHA-256 24ea7a14ceede940…

MALICIOUS

PDF

75.1 KB Created: 2021-04-04 01:45:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 76ce9b721fceefe8d3428ec2c0791cd9 SHA-1: e2dc7886358718e1d0af87144fe23cbef24eb680 SHA-256: 24ea7a14ceede94090b385102f1012e0b12b5f725b796ba8d57373bb623305f4
226 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

This PDF file exhibits characteristics of a link farm, directing users to numerous external URLs, many of which are hosted on disposable domains. The presence of a 'Password-protected archive handoff' heuristic suggests the document is designed to trick users into downloading an encrypted payload, which is then intended to be decrypted using a password provided within the document itself. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for distributing malware or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://golowaki.ru/strik?utm_term=gold%2527s+gym+power+spin+230r+recumbent+bike+parts PDF link annotation
    • http://sozapemogoz.mygamesonline.org/amway_nutrilite_products_catalogue.pdfIn PDF document text
    • https://kuvekimat.weebly.com/uploads/1/3/6/0/136052924/6875d.pdfIn PDF document text
    • http://kakafeg.scienceontheweb.net/point_io_1734_aent_manual_espaol.pdfIn PDF document text
    • https://bipuwuvi.weebly.com/uploads/1/3/0/7/130776795/6444755.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469626/normal_6060509bb48e8.pdfIn PDF document text
    • https://fipuwetula.weebly.com/uploads/1/3/3/9/133997959/bekexi_dodusevezo_xerawal_gudegenadul.pdfIn PDF document text
    • https://cdn.sqhk.co/tefegegesuxe/ljzWjif/vintage_hamilton_beach_milkshake_maker_for_sale.pdfIn PDF document text
    • http://sakivometo.medianewsonline.com/85034742542.pdfIn PDF document text
    • https://nuzupodulekego.weebly.com/uploads/1/3/4/6/134615520/nidegadamota.pdfIn PDF document text
    • https://cdn.sqhk.co/zapiseniw/jegjdgc/private_video_downloader_pc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4410965/normal_5ff1f5cc4262e.pdfIn PDF document text
    • https://zudimawavisutet.weebly.com/uploads/1/3/1/6/131606198/redoriko_sowirafasit_kewixamelok_xewiver.pdfIn PDF document text
    • http://mevixonur.mywebcommunity.org/28237669223.pdfIn PDF document text
    • https://cdn.sqhk.co/wajuletixex/6Fhhjbw/samsung_accessory_service.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4500677/normal_60663ddfaf5df.pdfIn PDF document text
    • https://kokesekodabese.weebly.com/uploads/1/3/4/0/134012443/pajoratalodiro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4469631/normal_603c7a9480ab5.pdfIn PDF document text
    • http://remoliwagofaju.mywebcommunity.org/astronomy_today_8th_edition_free_download.pdfIn PDF document text
    • https://cdn.sqhk.co/vonirosidejo/Uhjia0r/zoom_cloud_meeting_user_guide.pdfIn PDF document text
    • https://dekudabor.weebly.com/uploads/1/3/4/8/134893804/bakudorumige.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/bab0aab8-fb7b-4569-bba4-92fb83fd116a/vidijugabesopewufadawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c270d3fd-8207-4c39-a570-6f7e2a28887d/salton_ym9_yogurt_maker_directions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5588fad4-c578-4879-9c16-a5de427cce2b/metek.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_off0000e350.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE350 6292 bytes
SHA-256: b06407cba6c9aaeb9151cb01402085d30c2d443666bc512715bee29b9f340e8b
font_01_sfnt_off0000f8bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BB 10684 bytes
SHA-256: 99fc9c095322621b8e904a2efd34f381814b703b9d71c18aeaecdaf28e404c2e