Malicious PDF — malware analysis report

Static analysis result for SHA-256 422177ac455ad799…

MALICIOUS

PDF

93.9 KB Created: 2021-10-07 05:06:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 403385244afaa5dba60ae766847cc847 SHA-1: 75697bac0c3d6d3425d8eccf065b258d0515858a SHA-256: 422177ac455ad799ce01b46bf04e3263a9d49928312dcd0b01982b14c88863e0
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous domains, many of which are hosted on compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. While no scripts were directly extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9888

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://dewalt-naradi.cz/media/upload/editor/file/diwilaripifemubexagedi.pdf In PDF document text
    • https://www.higher-energy-trampolineclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16156e21897ca6---fokataleja.pdfIn PDF document text
    • http://miskolciharsona.hu/pictures/file/mapomirasufowemizepasiwi.pdfIn PDF document text
    • http://local-minicab.com/survey/userfiles/files/fizawefilurenakem.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/82251305255.pdfIn PDF document text
    • http://marasintl.com/public/ckfinderuploads/files/gatanigikabu.pdfIn PDF document text
    • http://descanso.verareyes.com/ckfinder/userfiles/files/kugukolebegiwe.pdfIn PDF document text
    • http://ibconsulting.it/userfiles/files/mokepevafalux.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/80744190100.pdfIn PDF document text
    • https://bibonatura.com/ckfinder/userfiles/files/30692590886.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2585cec54---denovibozo.pdfIn PDF document text
    • http://turchifiltri.com/userfiles/files/6487327711.pdfIn PDF document text
    • https://piauiaqui.com/ckfinder/files/xozozimulapogarenigarixib.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615130513c530---vejatixagogevu.pdfIn PDF document text
    • http://www.badischer-kunstverein.de/ckfinder/userfiles/files/92946688136.pdfIn PDF document text
    • http://uniontsg96.ru/admin/ckfinder/userfiles/files/33169922492.pdfIn PDF document text
    • https://sibois.eu/userfiles/file/gepegonuzubafebe.pdfIn PDF document text
    • http://gsnursing.in/ckeditor/ckfinder/userfiles/files/88037428951.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/b6b3e7ac0325499b0c3d5de7213004c1/juratodi.pdfIn PDF document text
    • https://27061010.com/uploads/files/202109241411204841.pdfIn PDF document text
    • http://szyuangang.com/UserFiles/file///rumabusox.pdfIn PDF document text
    • http://b-solutions.net/userfiles/file/dojajudimidud.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/ceaffc84a252e553b08f1e6a371aed7c/zomuxanajokijaxoxusizefol.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/60534187482.pdfIn PDF document text
    • http://katela.net/userData/board/file/83460570925.pdfIn PDF document text
    • http://loxocongnghiep.com/MINH/user_files/file/18699385665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=gif+happy+birthday+blessingsPDF link annotation
    • 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_off00010269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10269 20860 bytes
SHA-256: d1d4fa6cc23e75d11d197c8816b9b49c19a2b926781045ef261acd5edf71cd78
font_01_sfnt_off000138ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138AE 10952 bytes
SHA-256: abd6c533ae5f33db8554cfa7f4105b22cd0bef4eea7191e013f548f505340e01
font_02_sfnt_off0001519e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1519E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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