Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe0da1386fd56184…

MALICIOUS

PDF

66.7 KB Created: 2021-01-27 19:33:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: ed2eb59732418c0ec559b95a6892a46e SHA-1: b3e8957db1b7a70aef86738148555ab4bd657ddd SHA-256: fe0da1386fd5618451755a4d6cc05b46ef9abc108b0c169a1df0b497412bbfbd
186 Risk Score

Malware Insights

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

The PDF file contains a large number of external links, many of which are hosted on disposable domains or link farms, indicating a malicious intent to redirect users. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification scoring 0.999763 further supports this assessment. The document body's reference to 'Dota 2 event vods' is likely a lure to attract victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/123?utm_term=dota+2+event+vods PDF link annotation
    • https://tajuwelaf.weebly.com/uploads/1/3/1/0/131071184/situtejigeri-wosasagobi-zinidoso-rubutufego.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376869/normal_5fe8c6eea2d69.pdfIn PDF document text
    • https://xakivemo.weebly.com/uploads/1/3/0/7/130739368/fizovano_wavofixavuvudel_patowumozuvuri_kogumima.pdfIn PDF document text
    • https://cdn.sqhk.co/kezinujus/wNv98hj/jubibinipoxafokojodurixi.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/drjfcib/noirmoutier_en_l_ile_hotel.pdfIn PDF document text
    • https://cdn.sqhk.co/biluvetizom/zhiijtm/anime_wallpaper_boy_hot.pdfIn PDF document text
    • https://cdn.sqhk.co/vogoxaginoje/jfqb0lP/alarm_clock_app_for_pc_windows_10.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465403/normal_5fdb0f2f9fc9b.pdfIn PDF document text
    • https://fuxiwajusefu.weebly.com/uploads/1/3/4/6/134617271/wuvobedutabata_tawukigodam_lipob.pdfIn PDF document text
    • https://cdn.sqhk.co/jotoselu/iehjjaE/40606546135.pdfIn PDF document text
    • https://cdn.sqhk.co/jowowibow/MLifjUy/tips_bermain_asia_empire_2027.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413566/normal_5fd76ef6999cd.pdfIn PDF document text
    • https://rifijilaguselud.weebly.com/uploads/1/3/4/8/134846829/jagaredifaxovo_mupemozowifo_soletif.pdfIn PDF document text
    • https://cdn.sqhk.co/bidomutarili/hdQjcii/snapchat_login_forgot_password_and_email.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388613/normal_5ffb457406a46.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/sajatesawodiji/rawafinumofepukurepupigez.pdfIn PDF document text
    • https://s3.amazonaws.com/jasadavebaga/92695470452.pdfIn PDF document text
    • https://s3.amazonaws.com/dutimajizowa/numetoxi.pdfIn PDF document text
    • http://dosidojabar.epizy.com/modedawubinexibi.pdfIn PDF document text
    • https://s3.amazonaws.com/xakusineba/nidufanakutedadikofofo.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_off0000ca1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA1D 4880 bytes
SHA-256: 3a42b559b5f13664738376d00134467b6622b19f11da9000f4b68f7672556172
font_01_sfnt_off0000dad8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD8 9880 bytes
SHA-256: becabe4f1ff795af80842c15a3056a520cb09481aa0f8eb7e2af588de276d427

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