Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2359b31f9dc1951…

MALICIOUS

PDF

78.0 KB Created: 2021-04-02 14:36:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: ba50c9aab6a8190bff9cee7b613e86a6 SHA-1: ca562486904a6ee174b9a1b2344496e4d6039069 SHA-256: b2359b31f9dc19514348caf84d5b332a1d95972f9a77f055f38d1b8331ee5822
126 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The presence of external URIs and the overall structure suggest an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://kuzutuzo.ru/award?keyword=objective+c+tutorial+pdf PDF link annotation
    • http://fishland.store/fesasujikakqw538.pdfIn PDF document text
    • http://healthyforczechrepublic.site/the_spectacular_now_ending_sceneetf2h.pdfIn PDF document text
    • http://sentytld.online/presidential_succession_act_of_1947_listl6ago.pdfIn PDF document text
    • http://bossyonlinex.com/dilodixuverunnyyp6.pdfIn PDF document text
    • http://moymagazin.xyz/presto_canner_16_quart5nk00.pdfIn PDF document text
    • http://cosmicgig.com/6269140046pzvif.pdfIn PDF document text
    • http://dezowem.medianewsonline.com/xunobowufur.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4530910/normal_60088562ec7af.pdfIn PDF document text
    • http://xulubapatoso.scienceontheweb.net/tp_link_powerline_management_utility_download.pdfIn PDF document text
    • http://4338bacchus.com/23519090997jdtjc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477910/normal_60506c6325bdb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446270/normal_604703afc6ae6.pdfIn PDF document text
    • http://antinomi.design/geological_map_south_africa0jt9j.pdfIn PDF document text
    • http://lirifajo.sportsontheweb.net/xemigigigugexesi.pdfIn PDF document text
    • http://yozi.store/romans_free_bible_commentary_in_easy_englishvzu4q.pdfIn PDF document text
    • http://crysety.xyz/canon_sx510_hs_user_guidea2cv7.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/ded81a43-4e04-4be9-b74e-d0f305136365/95742214109.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/64a45cd7-9773-4e6f-a572-2311cebbef99/68951972126.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a21e354a-1af1-405d-a64e-472f54432334/3d_face_scan_dental.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a7bcfa1-f3fc-4d9e-96f8-db2b42d1aa8c/68789032611.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_off0000f297.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF297 5276 bytes
SHA-256: d0bfa7c0a5cd3317313f6b58cf0eed7619d0a5b1a6148b0611d36359aa72276c
font_01_sfnt_off0001049e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1049E 11244 bytes
SHA-256: 3037a0a61bed29fe90bef95f29b1ce8c7c8993166bb463364505082c327fa562

Open this report in the interactive analyzer, or submit your own file for analysis.