Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fceb3e10004195d…

MALICIOUS

PDF

103.6 KB Created: 2021-03-27 15:02:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 3ddbff54c0ad7abb4d851c7a8cbc92da SHA-1: b9a65466a2464e91545818b5ffeca870f411cfe7 SHA-256: 8fceb3e10004195dc7e1b8c4c3c4829da09c1a8570fc686949e0a2ab1b1c19fd
126 Risk Score

Malware Insights

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

The PDF contains multiple embedded URLs, with one specifically pointing to a domain associated with phishing and a deceptive query parameter suggesting a lure related to insurance. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for numerous links, further supporting a malicious intent to redirect users. While no scripts were extracted, the presence of numerous external links and the ML classifier's high confidence score suggest this document is designed to lead users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://soxebez.ru/123?utm_term=bajaj+allianz+motor+insurance+proposal+form PDF link annotation
    • http://zetanujagakane.iblogger.org/cardiologia_pediatrica_libro.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/ha4jhqk/ladevebasufuvisop.pdfIn PDF document text
    • http://optarfes.com/158361390629j982.pdfIn PDF document text
    • http://jixapijojuxev.iblogger.org/wexanapiwisozuwoxuz.pdfIn PDF document text
    • https://cdn.sqhk.co/vopuvafamiw/hBjghaf/maze_runner_the_death_cure_book_pages.pdfIn PDF document text
    • https://cdn.sqhk.co/lutotilivik/aPDr0S8/one_finger_death_punch_2_switch_france.pdfIn PDF document text
    • https://cdn.sqhk.co/zimopaji/fYW4Lgj/the_bowery_barn_llc.pdfIn PDF document text
    • https://cdn.sqhk.co/zurefaxenov/bjjmLf1/27300028426.pdfIn PDF document text
    • http://ellmax-site.xyz/como_convertir_un_archivo_a_word_online_gratis7goo6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fetufebutegiv.rf.gd/game_online_hay_cho_android_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6ec60a55-b983-4534-87a2-4dda687efa2b/how_many_calories_in_a_sonic_jalapeno_burger.pdfIn PDF document text
    • http://relotetuje.rf.gd/afcat_ekt_syllabus_2018.pdfIn PDF document text
    • https://5c51e3d7-2896-491e-a255-1b002e356b93.filesusr.com/ugd/5b6ce5_d7756b638dc54781ae3aab423d29f510.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/d08d08f2-cb3d-4c94-a39c-caad3d9725e1/kebomepefow.pdfIn PDF document text
    • http://nedomovoguluz.rf.gd/adolix_split_merge_2._1_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dc5d8a93-3fa3-42d5-9ddf-fc54d0520bfd/742531707.pdfIn PDF document text
    • https://a4758657-6aaa-4003-b0f6-1957e800abfd.filesusr.com/ugd/70c1f8_05ad0e81cefc4390a5cf86e55466d4a2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/56c8272c-0d25-42cc-9501-8a0dd4871bb6/new_yorker_magazine_dec_2020.pdfIn PDF document text
    • https://bf68d742-fb98-404a-ab47-1dcf24f7df52.filesusr.com/ugd/83e7fd_e26a29f25a8b423191c9cc52929c04b3.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000143b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143B7 5336 bytes
SHA-256: 25f1cf535a6fa8c7859800f1f4c8a58f89bc5ddb56ed725b36f75b685ae7c727
font_01_sfnt_off000155d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155D3 11084 bytes
SHA-256: e29f639803c7cac88af57d74768f55d3c12d4123d1e03f7e525e82011e681e81
font_02_sfnt_off00017bd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17BD6 16140 bytes
SHA-256: 159427b32ed66bfbde86def5e6c2992bde67dfb25400c4000a37c9b59b949b61