Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f86d30b3866cd2d…

MALICIOUS

PDF

93.5 KB Created: 2021-08-05 04:53:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: bef648f842089719d22836dc5335fd69 SHA-1: 49bf5259b37a44d51a1c5b33d84e55e0ab76d786 SHA-256: 2f86d30b3866cd2df143667e42ebf6d799370c826097f186600cdaee52e270da
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links to external websites, many of which appear to be hosted on compromised WordPress installations or disposable domains, suggesting a phishing or malware distribution campaign. The embedded links are likely intended to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • PDF link to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://infrive.ru/uplcv?utm_term=onn+full+motion+tv+wall+mount+32+47+manual PDF link annotation
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f297db60bd---jipemutenerijadakunidi.pdfIn PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a97ae2ac089---gefupidumizigegasad.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094164cc060e---67468179535.pdfIn PDF document text
    • http://starrsgazette.com/admin/images/file/kizofudurapenajogikuwixi.pdfIn PDF document text
    • http://forti.in/userfiles/file/93764298093.pdfIn PDF document text
    • http://biosite.ru/images/news/file/83227194954.pdfIn PDF document text
    • http://mutitar.com/user_img/files/81655704113.pdfIn PDF document text
    • https://centrorevisionimonregalese.it/file/80659552732.pdfIn PDF document text
    • http://geostudio.eu/userfiles/files/78837039917.pdfIn PDF document text
    • http://av-jet.ru/userfiles/file/5803021729.pdfIn PDF document text
    • http://119hero.kr/userData/board/file/bizobivekalipavunaxedibep.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bd9784811---nuzak.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609472cba2635---visaruga.pdfIn PDF document text
    • http://iwilldoit.ru/uploads/files/files/23351779765.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/mui7u5c48h629i9n5316d8dc65/werafejuzelaburu.pdfIn PDF document text
    • https://spectrumohio.com/wp-content/plugins/super-forms/uploads/php/files/3ed6a04fddbf2b4d2ffe95896d25dccd/kixuni.pdfIn PDF document text
    • https://flexrocksrollovers.com/wp-content/plugins/super-forms/uploads/php/files/mg7vgk7nu336entius1djbdjeb/rojekokigijiluf.pdfIn PDF document text
    • http://banlinhkienlaptop.com/userfiles/file/52702533537.pdfIn PDF document text
    • http://capmar.eu/userfiles/file/kefabometatoline.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A24 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012236.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12236 16956 bytes
SHA-256: b1967f1796bea0e88580afce6c4d8a3dd0434c76370467e17ebff06f73719f6d
font_02_sfnt_off00014e11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E11 10672 bytes
SHA-256: c437b076445e072370e06b72524681f9eef9b40d9af69a8c7e0c791d2f77bce3

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