Malicious PDF — malware analysis report

Static analysis result for SHA-256 0c780ec8faae9e5c…

MALICIOUS

PDF

70.7 KB Created: 2021-02-23 11:52:25 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 31dc5e2e1261433633784bf0db326bc4 SHA-1: c01888fd2b1eec80a2177a3284bf5282ad0c785c SHA-256: 0c780ec8faae9e5c96582be486e23fbf1bb92eb1ef6d1a4dbaf77d4fcc0b1154
134 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 and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crophysi.ru/wix?keyword=understanding+differences+worksheet+answers PDF link annotation
    • https://lisogawe.weebly.com/uploads/1/3/5/3/135312855/nubab.pdfIn PDF document text
    • http://salebox.shop/zuwivabefafegimekivclzd.pdfIn PDF document text
    • http://dkblogin-de.best/291168651136to5n.pdfIn PDF document text
    • https://sivaxawisebirim.weebly.com/uploads/1/3/1/4/131407763/ee76cfe4355587.pdfIn PDF document text
    • http://presalle.xyz/mimabalizuxoduwjhf1.pdfIn PDF document text
    • http://dressnbuy.com/barnett_vortex_hunter_compound_bow_specs6b3q1.pdfIn PDF document text
    • http://whitetwo.space/hydro_dip_tumbler_with_alcohol_inke2l3y.pdfIn PDF document text
    • https://cdn.sqhk.co/sinemajud/hfjabZD/ice_hockey_training_near_me.pdfIn PDF document text
    • http://tehnopolis.org/6886982008vk5ca.pdfIn PDF document text
    • http://domastmsk.space/kendo_grid_popup_editor_template_mvc_validation0qew4.pdfIn PDF document text
    • http://ayazshabutdinov.club/31783011680zhpg0.pdfIn PDF document text
    • https://fajizaxaro.weebly.com/uploads/1/3/1/3/131381717/pejejakele_somaribuluwemi.pdfIn PDF document text
    • http://pedalini.club/la_suma_de_los_diasuf02u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448548/normal_5ff8a8dccbc0e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/bisapovepizaj/cargill_inc_annual_report_2019.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_off0000d7cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7CC 5400 bytes
SHA-256: 0bdfb5df6c5fe89d3680204ca22b471c384ff4cd6b33737df7da6abfbb828c8c
font_01_sfnt_off0000ea40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA40 10384 bytes
SHA-256: c326573a46bd5935998d054a8883f850a04e24d6c1525be6c4ef05a22fee0e94