Malicious PDF — malware analysis report

Static analysis result for SHA-256 d5e67eac1cf4b4c8…

MALICIOUS

PDF

77.2 KB Created: 2021-03-31 16:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: b1d93050b20745d22502182583dfe213 SHA-1: df50c54e91dd42101ee59d1944b35a750ebf3d3f SHA-256: d5e67eac1cf4b4c8df3c838a826d03f541f5e26fff6760fd22d92b74b6d17c56
186 Risk Score

Malware Insights

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

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 0.9991

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://fokemale.ru/wix?keyword=john+cynthia+lennon+livro+pdf PDF link annotation
    • https://dujisiseruw.weebly.com/uploads/1/3/0/7/130776106/jixewovesexuwi.pdfIn PDF document text
    • http://xeberul.mywebcommunity.org/a1275_transistor.pdfIn PDF document text
    • https://kimuremosov.weebly.com/uploads/1/3/4/7/134732255/3788408.pdfIn PDF document text
    • https://digutejuwunapon.weebly.com/uploads/1/3/5/3/135325267/mabibexomogobes.pdfIn PDF document text
    • https://dumuzuvo.weebly.com/uploads/1/3/4/6/134695275/sivixisu.pdfIn PDF document text
    • https://fezuwarojeti.weebly.com/uploads/1/3/1/3/131383544/dipirezelano.pdfIn PDF document text
    • http://riniwodifole.medianewsonline.com/cae_exam_paper.pdfIn PDF document text
    • http://nout-sale.site/dmx_512_controller_programmingoeaig.pdfIn PDF document text
    • https://jusopusoguwukul.weebly.com/uploads/1/3/4/4/134494455/sumoma-jeratel.pdfIn PDF document text
    • http://leree6.club/nuvovosuwevinetaro231s0.pdfIn PDF document text
    • http://helplnstagramcontact6088758.com/port_greek_latin_root_examples8qgei.pdfIn PDF document text
    • https://debovibeki.weebly.com/uploads/1/3/4/7/134715081/358b8a3595.pdfIn PDF document text
    • https://jujopikin.weebly.com/uploads/1/3/4/2/134265816/100596.pdfIn PDF document text
    • https://sekikeke.weebly.com/uploads/1/3/4/7/134739811/4643149.pdfIn PDF document text
    • http://changepass.online/ukulele_strumming_patterns_4_4d4fg6.pdfIn PDF document text
    • http://sysfix.ru/motorola_sbg901_setup01r4u.pdfIn PDF document text
    • http://zonokiwuwagupu.getenjoyment.net/axiology_definition.pdfIn PDF document text
    • https://gifoxulexup.weebly.com/uploads/1/3/4/8/134865115/123369.pdfIn PDF document text
    • http://tupaxeguna.scienceontheweb.net/93097464864.pdfIn PDF document text
    • https://wefogazasu.weebly.com/uploads/1/3/4/8/134880183/8985710.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/975f5e64-a326-471c-99ac-e1dd5772dc26/how_to_see_sticky_notes_on.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5531e131-4ce3-4148-8495-f948059cf9c6/onn_universal_remote_codes_for_lg_blu_ray_player.pdfIn PDF document text
    • http://vulopekusape.atwebpages.com/encyclopedia_of_poisons_and_antidotes_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/33d77ef1-c9b1-40d5-a9a7-77484d60942a/64619187104.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9ab5e028-7ab9-48f1-9517-9d7c3de2c0bb/the_night_shift_horror_movie_2016.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_off0000f079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF079 5216 bytes
SHA-256: 4682473076976bd933a8d108ed11d49ad847d4ad4a5ef244882b007228070bbf
font_01_sfnt_off00010242.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10242 10912 bytes
SHA-256: a51ff830912024da7e4489fed43daee8070be5987d31702c8642fc0e24b2685c