Malicious PDF — malware analysis report

Static analysis result for SHA-256 75c37615d355d247…

MALICIOUS

PDF

79.9 KB Created: 2021-03-14 09:43:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-20
MD5: 06906da2a1ce0ae9c94eae568eacf550 SHA-1: 01610997ac6cc4d41ca13abd3720557340166081 SHA-256: 75c37615d355d24715e5011b7d3c3a14efffe54d9956a42e50730c08c6133841
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and a phishing/malicious document. It contains numerous external links, many pointing to disposable domains, suggesting an attempt to redirect users to potentially malicious sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • 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://jottigo.ru/wix?keyword=minimalist+guide+to+antorus+the+burning+throne PDF link annotation
    • https://cdn.sqhk.co/toneribabut/qjfSUz1/butterfly_table_tennis_clothing_size_guide.pdfIn PDF document text
    • http://mekapetakosa.22web.org/thank_you_for_your_quick_response_email_formal.pdfIn PDF document text
    • http://zozavelomidabi.scienceontheweb.net/how_to_reset_peloton_screen.pdfIn PDF document text
    • https://cdn.sqhk.co/bedepekemat/jfSLtge/argyle_pattern_template.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/cjcsSif/jemukenoxopagaji.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/gOgjghb/tubasovig.pdfIn PDF document text
    • https://cdn.sqhk.co/vukixukafoga/Cihjile/8770659725.pdfIn PDF document text
    • http://segorewadidet.iblogger.org/agrippina_vaganova.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://e4034479-4ead-418b-af8c-5be8dc72bdbe.filesusr.com/ugd/1e8759_7f4ae387dd734dc1a2463e50d7fe7fb2.pdf?index=trueIn PDF document text
    • http://radisabuvaba.epizy.com/7247080158.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bcb3227b-d6c5-412b-871e-44e81234042e/difference_between_nx200_and_nx300.pdfIn PDF document text
    • https://40ba1f7a-6e91-49bb-bbb8-dfbb40a2bc60.filesusr.com/ugd/22bf55_39e73994371f4a4697cf562a46284a67.pdf?index=trueIn PDF document text
    • http://dovobol.epizy.com/cervinia_zermatt_ski_map.pdfIn PDF document text
    • http://bajupigirosinaf.atwebpages.com/does_officemax_do_computer_repair.pdfIn PDF document text
    • https://cee4a208-09ac-40e0-983f-4c2cc776acbe.filesusr.com/ugd/5ed537_baa98e43273c4b59b5da8c010bead62e.pdf?index=trueIn PDF document text
    • https://59bb578d-b312-442a-858b-1a1a54b18a6c.filesusr.com/ugd/c79b1c_fa03c0feb078469d8afbc45239aef764.pdf?index=trueIn PDF document text
    • https://29ce6865-365c-47c4-9f0a-635d6f965865.filesusr.com/ugd/0d6b77_8f72a460a57d4d738341d6d7ace16200.pdf?index=trueIn PDF document text
    • https://41be308f-8a64-4dec-8b30-4937605be974.filesusr.com/ugd/f042fe_e9ab88b196ab4acf8e5cbb91d554e35c.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/220ff47c-7ee4-4d63-8661-6ab18ccc50f0/what_book_is_after_fire_and_ice_warriors.pdfIn PDF document text
    • https://8459f3b7-b2e6-4b58-af31-5f29adf293b7.filesusr.com/ugd/a68450_9d193733a15b4e4ea6f5245b448fe937.pdf?index=trueIn PDF document text
    • https://ce83042b-5faf-46b5-bcbb-9b4d05ec7d33.filesusr.com/ugd/a31856_6a244f160e544d2ebf29aff0195ea682.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/8f5312af-6de1-4fbd-b14e-ead7e170b137/93564246891.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d908592d-6baa-4ff5-8dc8-16a1d0771648/wonder_palacio_amazon.pdfIn PDF document text
    • https://a72b158e-cead-41d6-a0b3-8518216316a4.filesusr.com/ugd/35c6e2_85a3495bdab84e208392b38f74e2f06c.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_off0000fa77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA77 5384 bytes
SHA-256: 7ec92b4e6e9b8051b6996ef577fadd51b7897a3c5ca255cff240fbef0fbf8318
font_01_sfnt_off00010c98.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C98 10792 bytes
SHA-256: c5071c6bae093dbeb0508bc3763f441326e8aa4732047e886960d6a113b5b1bd