Malicious PDF — malware analysis report

Static analysis result for SHA-256 c567313243cfcd30…

MALICIOUS

PDF

85.3 KB Created: 2021-05-02 07:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 33dc5f5e9aa7475ba9e3ba54ffb1e9f5 SHA-1: 2220365e1813db9083222e635a2ec8fe857d679d SHA-256: c567313243cfcd30091f3474225e0261fd3bb5d9cd47211acbc215185407d918
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many pointing to disposable hosting or redirectors, indicating a likely attempt to distribute malicious content or phish for credentials. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' strongly suggests this is a link farm designed for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://jottigo.ru/strik?utm_term=the+raven+annotated+line+by+line PDF link annotation
    • https://cdn.sqhk.co/suvotoruwot/ijkjdru/2010_top_pop_hits_songs.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391303/normal_5feea345878bd.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4472486/normal_5fe4fd2ac4d10.pdfIn PDF document text
    • http://tideboweped.medianewsonline.com/accounting_for_leases.pdfIn PDF document text
    • https://cdn.sqhk.co/lolajelor/rBha3qt/rustic_wood_cutting_board_with_handle.pdfIn PDF document text
    • https://katigagu.weebly.com/uploads/1/3/4/7/134760011/8885606.pdfIn PDF document text
    • http://xufamorazogubov.sportsontheweb.net/cinder_elly_book.pdfIn PDF document text
    • https://vimiwegom.weebly.com/uploads/1/3/0/7/130775837/5bca3.pdfIn PDF document text
    • https://cdn.sqhk.co/bejomewuv/yjiRhgy/toca_hair_salon_3_download_for_android.pdfIn PDF document text
    • http://busimaderule.mywebcommunity.org/build_your_own_racing_cockpit_plans.pdfIn PDF document text
    • http://gojevomarokabe.getenjoyment.net/10856362363.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4391920/normal_5feb39d73da70.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/calculus_full_notes.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378604/normal_5fce950772126.pdfIn PDF document text
    • https://tuwavufubuxa.weebly.com/uploads/1/3/3/9/133997694/tomutaxas_lejunovasikesas.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/619b1766-4990-4355-a05e-4dc9ade29aaa/how_to_treat_a_ac_joint_separation.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d65e9f8f-ee31-4aa8-a8f0-982ec819d281/87914675311.pdfIn PDF document text
    • http://netawuwimirixor.onlinewebshop.net/south_africa_political_history.pdfIn PDF document text
    • http://rewuwuja.onlinewebshop.net/96773599930.pdfIn PDF document text
    • http://gajutar.onlinewebshop.net/amsterdam_map_attractions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7aaa5d86-165d-43e1-84d7-4f757de9a2b9/fokopabefanekatutezapewa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/415b3d8c-c56a-4e33-bdae-c424999d1cae/2003_ford_focus_battery_wires.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/shah_modified_barthel_index.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_off00011151.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11151 4988 bytes
SHA-256: 28ae309c24ccf9c6e520ff8030423be8c8b9d5cf9fc3e4e3f4ecf3a27cea6d5a
font_01_sfnt_off00012248.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12248 10600 bytes
SHA-256: 275176cb76cf4a72f9ae1077967839299c9e75b4a9fdc9f14f1c9d53f684921d

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