Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd2704d728ffde13…

MALICIOUS

PDF

132.2 KB Created: 2021-06-05 20:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 0cf0012fe89293236a93de91bdb29072 SHA-1: ad7fb2d6e262dc1cd25c6e9c06713e715a3af0be SHA-256: fd2704d728ffde136edd299102ba530384451803f12346a9821ccb4e11d9826c
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 0.9986

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://philabc.ru/pbw?utm_term=sri+suktam+in+telugu+pdf+with+meaning PDF link annotation
    • https://gawakugoful.weebly.com/uploads/1/3/4/7/134757428/delilibomofu-mugoxaf-wujovitatef-bixib.pdfIn PDF document text
    • https://fapizorimuko.weebly.com/uploads/1/3/1/1/131164308/2313604.pdfIn PDF document text
    • https://femesavez.weebly.com/uploads/1/3/1/3/131383434/3dd69b2bcdcd5.pdfIn PDF document text
    • https://mabexerezigija.weebly.com/uploads/1/3/5/3/135324341/1092474.pdfIn PDF document text
    • https://xazewipiw.weebly.com/uploads/1/3/4/7/134717961/nuxoju-disalejivu.pdfIn PDF document text
    • https://zuvimigiga.weebly.com/uploads/1/3/4/5/134586735/9164cfde6.pdfIn PDF document text
    • https://dotiduku.weebly.com/uploads/1/3/4/2/134234749/544de675d499.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://gabekujijud.pbworks.com/f/how_to_do_a_blackout_poem_on_google_docs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4d319e5-da3b-480d-9636-f089a59a569d/kujug.pdfIn PDF document text
    • http://molosafokaji.pbworks.com/w/file/fetch/144549882/starlink_satellite_internet_service_coverage_map.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/44d105b7-f758-4466-82b2-4c1710f2fca9/98921341208.pdfIn PDF document text
    • http://zexowisam.pbworks.com/w/file/fetch/144426231/autodesk_autocad_2018_tutorial.pdfIn PDF document text
    • http://pezeliv.pbworks.com/f/43687203163.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2389a9d0-74c1-4efa-be76-e78bb7bc2b07/15698001310.pdfIn PDF document text
    • http://molitutolu.pbworks.com/f/types_of_filling_machines.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efb3d8bc-7ef9-4b13-8555-e11554af9311/32481280939.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a92c47f-ed87-40aa-ab86-a6f97333c3d4/casos_de_factorizacion_trinomio_de_la_forma_ax2bxc.pdfIn PDF document text
    • http://xalanupuzewo.pbworks.com/f/dental_assisting_training_books.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcadaefc-398d-4ce8-9400-e86d154880de/25502595270.pdfIn PDF document text
    • http://fokopaviwu.pbworks.com/f/logitech_web_camera_driver_hd_720p_free_download.pdfIn PDF document text
    • http://sodopateduke.pbworks.com/f/13564880514.pdfIn PDF document text
    • http://nikekuva.pbworks.com/f/how_do_i_retrieve_a_deleted_voice_memo_on_iphone_6.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/821e973e-6af3-4506-bc5e-04bcf35508d8/kaxidomivubosivutibar.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000134df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x134DF 5488 bytes
SHA-256: 56efe5a3db5b1fe0bca7ec85458730662b222eee8a7a91fa1649bdae99a12ef0
font_01_sfnt_off00014762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14762 79792 bytes
SHA-256: 9b37c9ae986d7e22f89ea46e0e64e7440af6424bb7cf0d392198a312ac294d08
font_02_sfnt_off0001d1fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1FA 9328 bytes
SHA-256: 0de4a60b134d9d570e29198838efe2d1b4d45a064800483ecc7b1f3a70534d90
font_03_sfnt_off0001f1da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F1DA 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3