Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd8757811d16ee5a…

MALICIOUS

PDF

73.9 KB Created: 2021-03-21 23:33:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: a05f43e88d731e95163f6049ba2a9a30 SHA-1: 52d6fb19fa69ea53182241409854f4aeccd19c77 SHA-256: fd8757811d16ee5a213afa54ff46bc15440ea25b306744f1840dd5c173d5652f
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary one leading to a site offering a game hack, suggesting a phishing or malware distribution lure. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/wix?keyword=bloons+tower+defense+5+hacked+online PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4458616/normal_6023018dede7f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4456666/normal_6056e8a58b748.pdfIn PDF document text
    • http://texivej.sportsontheweb.net/army_apft_scorecard.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472475/normal_60380c9383105.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4412379/normal_605587742d4b1.pdfIn PDF document text
    • http://kogemotuju.getenjoyment.net/90072151782.pdfIn PDF document text
    • http://drnextact.xyz/remington_700_sps_tactical_maximum_effective_rangebezfg.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445324/normal_5fda525769714.pdfIn PDF document text
    • http://xariketixagat.mypressonline.com/bizebebup.pdfIn PDF document text
    • http://sport-stavki.fun/timelapetoxidje0q2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490523/normal_601d4c263097e.pdfIn PDF document text
    • http://vseti.life/21853984262qq6w.pdfIn PDF document text
    • http://luminar2-download.xyz/black_flag_40-watt_electric_bug_zapper_reviewsy7nui.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4427095/normal_5fc942bda3567.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409250/normal_5fe42f441a5d3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490252/normal_60026070dab79.pdfIn PDF document text
    • http://buzevuzelape.mywebcommunity.org/bsc_agriculture_syllabus_2020_tnau.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/6dfaa399-db7b-4b45-876d-5c52e0a70d31/59146408295.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/electromagnetic_waveguide_attenuation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e327d2-6b82-4ac3-b39d-68694bc7eccf/59511619310.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c245903-552b-404d-8dcb-b54792925043/79947577776.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/80929103944.pdfIn PDF document text
    • https://s3.amazonaws.com/timituvupame/d_d_5e_homebrew_monster_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8eb4f919-f0ac-409f-99a8-ba282b5f74f2/a_series_of_unfortunate_events_cast_season_3_frank_and_ernest.pdfIn PDF document text
    • https://s3.amazonaws.com/wemofodi/tinidaxusirar.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_off0000e4e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4E7 5436 bytes
SHA-256: 9e00cc865522d9abce6e056a01d3498e12f46c119eb3a43ae3fcff70665b71ce
font_01_sfnt_off0000f77e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF77E 10096 bytes
SHA-256: b35dbe91ee4e85bc3a1479ab12b1f734837966ad953878ffbff1800c87b50722