Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ff50c596217a65a…

MALICIOUS

PDF

68.1 KB Created: 2021-05-01 20:55:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 7321b97b613ca75b81d16975b6135c6a SHA-1: 1022f0a73d6352df7e726bea3913d7bedaabd163 SHA-256: 1ff50c596217a65af621e9846f409914f2d89e926376b1b3654c059416902e8c
184 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier also flagged this file as malicious. While no scripts were explicitly extracted, the presence of numerous external URLs suggests an attempt to redirect users to malicious sites, potentially for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7003

Heuristics 5

  • 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
  • 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://ponafet.ru/strik?utm_term=truck+driver+simulator+ps4+release+date PDF link annotation
    • http://dobewobezusisof.iblogger.org/anatomia_de_cuello_y_cabeza_para_odontologos.pdfIn PDF document text
    • https://cdn.sqhk.co/gomiwopizi/P1Wxkjf/48258299341.pdfIn PDF document text
    • https://kawuzuke.weebly.com/uploads/1/3/1/6/131606938/davepemir_viwikonafuwufi_baxofepafi_mezijilixovagi.pdfIn PDF document text
    • https://zujuwaxi.weebly.com/uploads/1/3/5/3/135307850/sibawag_bekoxinodovix_lozixamupedutek_katisif.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/ig8ghjg/yandex_money_usa.pdfIn PDF document text
    • https://jedawakebikota.weebly.com/uploads/1/3/4/7/134715316/3861690.pdfIn PDF document text
    • https://cdn.sqhk.co/xusarukave/Ihcjcii/ricky_carmichael_mx_school.pdfIn PDF document text
    • https://joverukaded.weebly.com/uploads/1/3/4/4/134433057/regejime-mibulujuwoleb.pdfIn PDF document text
    • https://lofidebonejiniz.weebly.com/uploads/1/3/5/3/135334880/5158333.pdfIn PDF document text
    • https://delovamubikener.weebly.com/uploads/1/3/4/7/134707073/ratabivubijab.pdfIn PDF document text
    • https://lowinuviposawip.weebly.com/uploads/1/3/4/6/134667304/8781100.pdfIn PDF document text
    • https://gilasagajeradek.weebly.com/uploads/1/3/4/6/134632792/7448312.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/561179f3-0ce6-40ca-bb77-1d7841cdcbdb/attack_on_titan_manga_season_4_manga.pdfIn PDF document text
    • https://03dfb0eb-7fe6-4188-ad87-ea2b88df7b19.filesusr.com/ugd/f967ac_8425429aa8eb4aa6891f8400ab2ad67d.pdf?index=trueIn PDF document text
    • https://d5fb4b5d-766d-4e54-ab1c-ecc61d2b7d82.filesusr.com/ugd/b0c8dc_ceba14fcf37d47838f7c6795c8e77237.pdf?index=trueIn PDF document text
    • https://404c0e03-56c4-4888-bb84-d9d32a71a3e4.filesusr.com/ugd/100e2e_4ef101f710e445038de200885f4b1c65.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/da9edd0e-c096-46c9-89fb-041e7c3a6ce7/36364942027.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2f0cacda-d166-4832-a53e-deda710a7ac7/hp_pavilion_dv6-2130eg_technische_daten.pdfIn PDF document text
    • http://wisunomimat.epizy.com/british_journal_ophthalmology_case_reports.pdfIn PDF document text
    • http://koluriv.rf.gd/pedifotut.pdfIn PDF document text
    • http://denefarow.rf.gd/18478826584.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/80417baa-beb8-4cb7-bd3b-3964cf5020a1/how_to_care_diabetic_patient.pdfIn PDF document text
    • https://a3cd4400-5fdc-4e6a-bda8-88556a2d4d1f.filesusr.com/ugd/2f7489_5fa2892097774b739a478bd6d53d86a4.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/3c32efb7-65ee-46e6-bace-83f6f69749dd/algorithmic_trading_python_code.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0D1 5380 bytes
SHA-256: 6b65485db6b6ac264dc70204844f119a052d09381d0ffae6d834b07920961e61

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