Malicious PDF — malware analysis report

Static analysis result for SHA-256 0de329a9abf230bd…

MALICIOUS

PDF

85.7 KB Created: 2021-07-08 04:31:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 40ab41fd36fd9a9be70a6760d1dc70d7 SHA-1: 4bb0d2258534aae9e96a5e6d864ced7c43202468 SHA-256: 0de329a9abf230bd0e1b02521f978c4b32c8b8fe31a1b39d02a5bfce638b06b9
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains embedded JavaScript and numerous links to external websites, many hosted on compromised WordPress installations. The URLs suggest a lure related to PDF conversion tools, likely intended to trick users into downloading malware or visiting phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=pagemaker+to+pdf+converter+free+download PDF link annotation
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/1607c544e274be---68029385929.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/bkp5p64i36hdpsc3j858q48sp2/40433679572.pdfIn PDF document text
    • http://am-assets.com/aom/magnolia/userfiles/file/xotifugapevopuwu.pdfIn PDF document text
    • http://benthanhsgfarm.com/images/uploads/files/mixekatujibilesapoxigif.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-6-13/20210613032925245508.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/7f67fa2404488fc2d70c6db43b87c39b/68256290931.pdfIn PDF document text
    • http://peeweeslearningcenter.org/clients/5/54/545fcf94abc6bccf175f3035c740e6d3/File/jufulajumene.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/zivozug.pdfIn PDF document text
    • https://radmangroup-ye.com/rgfiles/file/jedawiz.pdfIn PDF document text
    • http://snotlicker.com/clients/10243/File/77268915387.pdfIn PDF document text
    • http://klimatyzacjaradom.pl/userfiles/file/xifoxutesuzawixagu.pdfIn PDF document text
    • http://wirheiraten.de/images/file/90252844913.pdfIn PDF document text
    • https://njsolarpower.com/wp-content/plugins/super-forms/uploads/php/files/9e6e72d65f4de5aefe20e60a880b21bb/komugokujofe.pdfIn PDF document text
    • http://queuemanagementsystems.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34a35aca7c---22588938717.pdfIn PDF document text
    • http://dynamic1984.com/user_file/file/37683693358.pdfIn PDF document text
    • http://stcforanebanglore.smcim.com/www/js/ckfinder/userfiles/files/65876986262.pdfIn PDF document text
    • http://nutranghongngoc.com/media/ftp/file/fedobi.pdfIn PDF document text
    • http://www.korayozelguvenlik.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094c07bd57cb---bazadid.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/ar8v0hulail11o3lt4qimtmnl6/82912510198.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/0fee42c638d5c984253ce8f19283eaaf/duwej.pdfIn PDF document text
    • http://igabana.com/upfolder/e/files/20210618215706.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/114b7cd387e61622c5a03870550cfacd/sifodebuwudijizo.pdfIn PDF document text
    • http://lorofilmes.com/Uploads/ckfinder/userfiles/files/rudusasevo.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/0ab175afc28045af43c87da4f6a432d6/lotajimufisopiko.pdfIn PDF document text
    • http://workprohealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607bcf73485e5---mijekabedonazufe.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2ED 10948 bytes
SHA-256: ec0719246137948f7a5c6f02ea45daea5532defb8ad511f393cce86ba32ad453
font_01_sfnt_off0000ec29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC29 16252 bytes
SHA-256: d66bf48e304c78f6080084e0c9704384de85738853ce87f784528b0e0784b990
font_02_sfnt_off0001020f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1020F 17244 bytes
SHA-256: 913d5d073806dd171e2791d9a9588dcfd5dcb10505665d7080cdae9920a94ac8
font_03_sfnt_off00012ef8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EF8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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