Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ff99210599fafce…

MALICIOUS

PDF

83.9 KB Created: 2021-03-18 11:47:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5bebacab814791041ad6dc4958471846 SHA-1: 44217e8528e4d4ef02f0d06bbc5f9365581bda07 SHA-256: 8ff99210599fafcec9e1be8c4753555929fb09471d474e833744d03c3786f958
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, identified by the PDF_SEO_LINK_FARM heuristic, suggesting a link farm or phishing attempt. One of the embedded URLs, 'https://ponafet.ru/aws?utm_term=my+friend+dahmer+book+quotes', is flagged as unknown reputation, and several other unknown reputation URLs were extracted. The ML classifier and ClamAV detection strongly indicate maliciousness, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ponafet.ru/aws?utm_term=my+friend+dahmer+book+quotes
    • http://hookup681.site/mobb_deep_survival_of_the_fittest_instrumental_mp3rc2t6.pdf
    • https://tadonajates.weebly.com/uploads/1/3/4/3/134319020/3683767.pdf
    • https://pavenepono.weebly.com/uploads/1/3/1/3/131383439/4032301.pdf
    • http://about-central.com/loxonesadoxitulupisobuwbocid.pdf
    • http://testvvd.xyz/christmas_garland_for_table_runnerd79bz.pdf
    • https://levapexufusetij.weebly.com/uploads/1/3/4/9/134904519/4171088.pdf
    • http://ndfnasg.xyz/i_want_to_pay_my_dish_network_billzawvc.pdf
    • https://bapamebitisetup.weebly.com/uploads/1/3/4/3/134325238/7470243.pdf
    • https://pesawuzopedeg.weebly.com/uploads/1/3/5/3/135327269/2318715.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/054cf7f1-daeb-4b2c-bf52-9bc737ae6646/sesulimubepavixapomofo.pdf
    • https://s3.amazonaws.com/libeganot/5777351015.pdf
    • https://uploads.strikinglycdn.com/files/66e93b13-d5a9-46b5-bfb6-f3688821c413/harmony_hub_remote_not_working.pdf
    • https://s3.amazonaws.com/gelawiweza/best_english_grammar_course_on_youtube.pdf
    • https://uploads.strikinglycdn.com/files/c49331ba-d0d1-4fc3-886d-1006d48e1027/liars_dice_game_instructions.pdf
    • https://uploads.strikinglycdn.com/files/470157d4-4002-41f9-abea-1001eabff562/why_is_my_speaker_not_charging.pdf
    • https://s3.amazonaws.com/wozowuledij/wibiletite.pdf
    • https://s3.amazonaws.com/vabedafozo/batman_2_tamil_full_movie.pdf
    • https://uploads.strikinglycdn.com/files/3cb8d3d0-1a67-443c-8f6e-e3874477a7ad/baxenatomupugup.pdf
    • https://uploads.strikinglycdn.com/files/e83098af-1700-4a97-874c-afec238d3e97/26183760819.pdf
    • https://uploads.strikinglycdn.com/files/d32cd015-7cb4-4638-bb09-c7a9ce9807f2/garalejalovirof.pdf
    • https://s3.amazonaws.com/saziwijaxodav/autocad_technician_jobs_work_from_home.pdf
    • https://uploads.strikinglycdn.com/files/30c6ed5f-5b1f-4809-9b60-b8b80a485644/symbol_ls2208_laser_barcode_scanner_manual.pdf
    • https://uploads.strikinglycdn.com/files/4158c465-0173-4d4d-a14e-781c9afb8572/xugeje.pdf
    • https://s3.amazonaws.com/veraxawewib/rii_rk100_keyboard_software.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e0.bin
f0a22a7294b2dee52288195fa49bd66ac28f42065734f0a6e3c832b1e0073fce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 5552 bytes
font_01_sfnt_off000119a7.bin
63db55800462306d414bf2609cede310d9c1e544de05e241c80382ee77304313		 pdf-font-stream PDF embedded font (sfnt) at offset 0x119A7 11824 bytes

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