Malicious PDF — malware analysis report

Static analysis result for SHA-256 14ba6bf5fc4effeb…

MALICIOUS

PDF

77.5 KB Created: 2021-03-25 02:26:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b090868a630ccbdc2bb63d2f92e19157 SHA-1: 9b7681bec722551ce13f52899c27561c6c0902ad SHA-256: 14ba6bf5fc4effeb3c0c10789a8f1cb9b5afd3dab3667114534c922fe0da7645
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 0.9992

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 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://jumiwimov.ru/strik?utm_term=ihome+ibt230+set+clock PDF link annotation
    • http://dawexefif.getenjoyment.net/65371489545.pdfIn PDF document text
    • https://cdn.sqhk.co/fafaviwi/6Zjewgj/pandemic_ebt_virginia_october_2020.pdfIn PDF document text
    • https://cdn.sqhk.co/baxotonad/ejhEvGp/23550118061.pdfIn PDF document text
    • https://cdn.sqhk.co/nubevitawil/jiFhbhj/my_ip_server_name.pdfIn PDF document text
    • http://xasanefajisa.sportsontheweb.net/annahar_newspaper_lebanon.pdfIn PDF document text
    • http://lifolibi.sportsontheweb.net/turotumapuw.pdfIn PDF document text
    • https://cdn.sqhk.co/kivipemo/yUjhOie/kidafodalatariforinoporeb.pdfIn PDF document text
    • https://cdn.sqhk.co/kevekelobivo/DicjgJq/pogirutad.pdfIn PDF document text
    • https://cdn.sqhk.co/zekafomaze/f4jeV7L/fantasy_dragon_model_kits_uk.pdfIn PDF document text
    • https://cdn.sqhk.co/kajipazuto/SkhiVif/fituwik.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/dowavelaxam/falling_yiruma_piano_sheet_music.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53e88232-63b8-41e7-98b3-9824c64b0c82/vujuxevixurarodugugadones.pdfIn PDF document text
    • http://zewadomi.myartsonline.com/insurgency_in_kashmir.pdfIn PDF document text
    • https://f7cac2f2-528f-490f-9bef-cb2448a877de.filesusr.com/ugd/529ba0_c1a01781fdc94958b4a0ef43338300cd.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/sikuva/66578994770.pdfIn PDF document text
    • https://2ddf8be6-044d-4f30-b6fd-16c032829cd6.filesusr.com/ugd/9827ea_35b6e043b1fa4264800e72726f7e49cb.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/dcc85231-e4cc-48a4-8296-9dc4b9498222/20814355559.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39732812-4fa2-43ab-b675-60316bdeab03/craftsman_6_gallon_air_compressor_owners_manual.pdfIn PDF document text
    • https://f7f2eb1f-4ce6-40bf-b337-6bcc2c9c1a95.filesusr.com/ugd/dc6899_11eb5980dd4541a6a1ef9213b31d3a4f.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fuwawibu/gogisuzenifujanawefapek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1f32ba3-d18b-49de-a75b-88319a5470cd/93382085764.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a5bd55ac-7607-4922-8d64-0b409721bd3c/11557869049.pdfIn PDF document text
    • https://22e365c6-0853-42e1-82f8-83473bf9c0bf.filesusr.com/ugd/217d68_62742ff900e0470eb1b4288b8f7442d0.pdf?index=trueIn 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_off0000f149.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF149 5312 bytes
SHA-256: 80a062d1a64d8a961fb3981ddd6385dc128ca150c55e235a24d8a03c52aca4c6
font_01_sfnt_off0001033d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1033D 10808 bytes
SHA-256: e4905a41860103bd8e2bea139ab475be3d1be8a6d1bdda7272addc7fcce34d81