Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59e78c700b83e48…

MALICIOUS

PDF

78.6 KB Created: 2021-05-03 04:42:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: bf42f650bd71b2df9f5ed0d4c59ca7c0 SHA-1: b00c7b5057005e0cd23f3f4816aac8a584d31e70 SHA-256: a59e78c700b83e4840d783b0a7b1d9cc9016ffea9d9ece780f2546e5e925a003
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

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 0.9961

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 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://xezojetit.ru/strik?utm_term=erikson+8+stages+of+psychosocial+development+ppt PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4480732/normal_60337c0bc2e6e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4401983/normal_60066d93c17b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501991/normal_603a1c95d76f0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380680/normal_6023ecb296095.pdfIn PDF document text
    • http://fiselijuduguge.iblogger.org/carbothane_134_hs_product_data_sheet.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4449193/normal_6045c83e52986.pdfIn PDF document text
    • http://wordwild-store.com/nintendo_dsi_operations_manual_reset3yx40.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4375076/normal_5fc7a3b59d493.pdfIn PDF document text
    • http://tramlaweq.online/how_do_you_fix_a_kenmore_ice_makereu288.pdfIn PDF document text
    • http://itmax.info/dikirak3f4zu.pdfIn PDF document text
    • http://pokemonrivals.online/ramcharitmanas_tulsidasxw2ku.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4410985/normal_60642153e32d1.pdfIn PDF document text
    • http://pitetivedu.iblogger.org/8214001265.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447885/normal_605b4e6ecbe51.pdfIn PDF document text
    • https://dunokosira.weebly.com/uploads/1/3/5/3/135349308/safolasorujulapo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4419437/normal_5fce74b5c2496.pdfIn PDF document text
    • http://kemytbok.xyz/60224247712zkamg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4382789/normal_6000ee0986656.pdfIn PDF document text
    • https://rifusefabizavi.weebly.com/uploads/1/3/2/3/132303317/7622912.pdfIn PDF document text
    • https://jamolirotiwe.weebly.com/uploads/1/3/4/6/134693152/retuwirefopa.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/bdc9b039-4b2b-439f-8253-fd7b147a9cb1/duxosonu.pdfIn PDF document text
    • http://lolefijulakemi.rf.gd/porutojixorosud.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e4cea923-cd10-4511-8d8f-4190fe2aa80e/james_baldwin_books_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efa6e890-ab1d-4a5d-b1a4-a1fbbf6419ac/68638056680.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edcd36d1-58d3-474b-bae6-b3f77f5c8624/4646820106.pdfIn PDF document text
    • http://vusomafolu.rf.gd/tubupodit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57d41f42-6ccf-4886-88b6-0be47202e444/mobility_scooter_battery_change.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_off0000f325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF325 5944 bytes
SHA-256: 38ab20c1af0f21ce839e079360c28444eac7ccc1cd5d9cb288ca89b6b94f25f2
font_01_sfnt_off00010753.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10753 10348 bytes
SHA-256: 074b65b56e90342be9051a095d56079e26bc36f9e5ec922b7a60f16393b932ad