Malicious PDF — malware analysis report

Static analysis result for SHA-256 08c983f872b8de22…

MALICIOUS

PDF

75.7 KB Created: 2021-05-23 16:44:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 2ba9cdd349cfdf924a18f2b86db3c19e SHA-1: 00d53985eb8107323d29f5a9a8e5d48f3bc3c39f SHA-256: 08c983f872b8de22c2b1a20c1913bd6a92623414a9fee4d8677183d240c86f07
184 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.8702

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://vilenefex.ru/strik?utm_term=palabras+de+sentido+pesame+para+un+amigo PDF link annotation
    • https://losarofimet.weebly.com/uploads/1/3/1/3/131384333/boxumid.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417834/normal_606a3841e9fd8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387932/normal_601b4852eb077.pdfIn PDF document text
    • https://wakaxizuso.weebly.com/uploads/1/3/5/3/135322555/mofunetix-vabavido-lotevojiduvi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4443325/normal_6054270df031c.pdfIn PDF document text
    • https://zufulakoloti.weebly.com/uploads/1/3/5/3/135301661/zipefi.pdfIn PDF document text
    • https://xawupaxov.weebly.com/uploads/1/3/4/6/134699297/zidimepokiw.pdfIn PDF document text
    • https://wudowured.weebly.com/uploads/1/3/0/8/130873715/8457823.pdfIn PDF document text
    • https://xapugugividus.weebly.com/uploads/1/3/5/2/135298581/kibumokovo.pdfIn PDF document text
    • https://vuzivofe.weebly.com/uploads/1/3/0/9/130969370/nobesifekodesip-pibenitiwinov.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/2b9510db-db59-474d-8a66-17b00983e29a/wu_tang_saga_hulu_episodes.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cf912c-0507-442c-b956-89fff6690f9a/canon_powershot_sx700_hs_instruction_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/ruzuzavaguj.pdfIn PDF document text
    • https://s3.amazonaws.com/vofadoloves/tajobabosekin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/da88de91-f14a-4d50-8f92-86f78f8a27ea/are_impalas_reliable_cars.pdfIn PDF document text
    • https://s3.amazonaws.com/tubukeganuji/c_i_d_full_form_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df3aa954-da84-4ea9-85a5-087a1214ec55/philips_9000_shaver_cleaner.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5e2cbd9f-632e-4da3-9819-f22d6fb42241/feliletitisefevukelaw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55cf1d30-c63b-4a79-9f8d-169e9df293b5/dewunuzemezen.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c7b5f294-cc39-415b-a0f9-540875f2b995/92445676930.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16778360-9039-4b0e-8c70-40638845c903/how_to_program_a_chamberlain_remote_control_garage_door_opener.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_off00010cbf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBF 5304 bytes
SHA-256: 4c8c0a29344f67aa96d6045d6e8e6e6d74162f2ec35661536ed3e09b3933e60c

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