Malicious PDF — malware analysis report

Static analysis result for SHA-256 be67098aff0b159a…

MALICIOUS

PDF

80.2 KB Created: 2021-03-04 17:46:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-04
MD5: 89ba7f73320a2e1227b4acc607413aed SHA-1: f067ef196c6ef193412359322ddf55b314535f1e SHA-256: be67098aff0b159a9b142ffcea1946e82384584ea6c7be92b6ac1b5695f135fb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains, and is flagged by ML classifiers and ClamAV as malicious. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of external URIs and the overall structure strongly suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://botokaw.ru/award?keyword=how+do+you+interpret+the+constitution PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4488817/normal_5fda274f21821.pdfIn PDF document text
    • http://chunyoo.com/lezawodasivonizod16lcc.pdfIn PDF document text
    • https://cdn.sqhk.co/mugolino/h9iixEP/toca_life_boom_doom_theme_park.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4471474/normal_600809d8ee565.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380078/normal_600abff74e17c.pdfIn PDF document text
    • http://mebovedu.getenjoyment.net/miragol.pdfIn PDF document text
    • http://jivusibofonefud.mygamesonline.org/janaxunafokilonafomokif.pdfIn PDF document text
    • https://cdn.sqhk.co/faruvate/cu0icNX/volleyball_tournament_manager_software.pdfIn PDF document text
    • http://lulopoboxefon.scienceontheweb.net/13950299281.pdfIn PDF document text
    • http://davupopebuwiser.sportsontheweb.net/12_steps_download.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499958/normal_603040b56507d.pdfIn PDF document text
    • https://cdn.sqhk.co/nowavutu/77gdHjj/nba2k20_locker_codes_vc._org.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/hcE6hfY/59272653607.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412380/normal_5fe9037901683.pdfIn PDF document text
    • http://xtrading.buzz/biblia_plik3ka.pdfIn PDF document text
    • https://cdn.sqhk.co/rupomotiz/ghbVHSy/45772436177.pdfIn PDF document text
    • http://priz24.site/51352691830sq3c0.pdfIn PDF document text
    • http://cryogen.me/539085707367uzjl.pdfIn PDF document text
    • https://cdn.sqhk.co/gewanunu/XfCrnL8/world_of_guns_gun_disassembly_hack_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://20996a60-9695-4f45-8fdb-44bdc783da55.filesusr.com/ugd/c57cae_ad9fbb05d3e648cabf6b22e367e66430.pdf?index=trueIn PDF document text
    • http://desejole.myartsonline.com/harry_potter_y_el_prisionero_de_azkaban_full_movie.pdfIn PDF document text
    • https://c0b8f06b-4e98-4d3d-89ef-2f08caba629a.filesusr.com/ugd/0c8cc8_6eef1e8e733848edbbba803a0fd5bdc1.pdf?index=trueIn PDF document text
    • https://db7841a4-af10-4990-a2be-f084cd4acbf6.filesusr.com/ugd/e3c460_b2a1909359264981921be8832c5230ae.pdf?index=trueIn PDF document text
    • https://cd489911-dc6d-4439-b408-84622343fb93.filesusr.com/ugd/d8e941_9df05d6777fc4430868a91b43fd09340.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f03e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF03E 4956 bytes
SHA-256: 398fc2f944460d64a0569682928caeef1fe4eae7ff38c5478cdb2c634540e2d3
font_01_sfnt_off00010123.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10123 10456 bytes
SHA-256: 466ff53ef4693075e5087f060a5146a8f582902ba5eed01d31cdd0dbbf6a8825
font_02_sfnt_off000124e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124E4 4324 bytes
SHA-256: a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f