Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5c2a85d2900a0fc…

MALICIOUS

PDF

77.1 KB Created: 2021-03-06 10:01:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 70355ac58969b669d6517b7eab7fd38b SHA-1: a28dfe8fe4fc2da75939d30654d7e346cd3266cb SHA-256: a5c2a85d2900a0fc9bb6ec65104aba431ee1557e4b2e6bf6e51689abf832fe8c
134 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 and presents a deceptive download button. 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-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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://maypoin.ru/strik?utm_term=victoria+secret+catalog+online PDF link annotation
    • http://wepijafiguwenan.mywebcommunity.org/ranger_boat_dealership_in_alabama.pdfIn PDF document text
    • http://sawedes.mywebcommunity.org/creative_writing_prompts_for_5th_grade.pdfIn PDF document text
    • http://kopogaxepaku.sportsontheweb.net/48863271291.pdfIn PDF document text
    • http://korefubelexusiz.medianewsonline.com/wadidirifuwiwojijopomowu.pdfIn PDF document text
    • http://pidagenavuziw.mywebcommunity.org/83818629525.pdfIn PDF document text
    • http://juwaniwabi.medianewsonline.com/fixubojo.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/44a841f5-8e06-468d-8a07-82e60eefbe30/george_foreman_grill_meat_cooking_times.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8e5bd9d-90de-4e01-b111-a3e98db5ba7d/jawbone_jambox_pairing_problems.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d0a697e-33e8-40a1-a4b0-7b3f4cf052d1/gesovenanoparobag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ff1c93f9-2bd6-4203-aa43-0ab4ce05efd6/56571711355.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/157f81e6-342c-49ed-baf0-e51228263c64/vurimoga.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c8c4200-b97f-4692-b172-097e78ac59e5/how_to_program_comcast_remote_to_philips_tv.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/afae2cb8-957d-4d5c-a9e0-d13a19514d87/how_do_you_demonstrate_service_excellence.pdfIn PDF document text
    • http://rexefobixavater.myartsonline.com/mini_protean_tgx_biorad.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c9c133fa-9eca-43f1-a018-d189b0b8b979/golds_gym_stride_trainer_350i_price.pdfIn PDF document text
    • http://dubafelizam.epizy.com/53046460832.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5be2d742-ab46-43c1-b9da-4cce1388af3f/how_to_think_intelligent.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a8297f35-9a29-4717-aa4b-d86040504a88/65189583998.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e481df53-7abe-4ba1-80c6-a1f2d5ff6413/the_miracle_morning_book_in_hindi_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c8514d11-af3e-4344-9e34-4363b6432599/64895221816.pdfIn PDF document text
    • http://gupexofuvesok.epizy.com/amman_padal_audio_songs.pdfIn PDF document text
    • http://kizarepopudoso.epizy.com/75566064177.pdfIn PDF document text
    • http://jomupaz.myartsonline.com/80498992462.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_off0000f13c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF13C 4932 bytes
SHA-256: 0d138df60c7fbb0e2902eb2e0d685c44c32516e0da349c0442009a390a676723
font_01_sfnt_off00010216.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10216 10884 bytes
SHA-256: 4e0ebe4245bd65a18297976cc641bc76dd5aa9e4fb939d0604501599bc3c910f