Malicious PDF — malware analysis report

Static analysis result for SHA-256 addf3288331799f0…

MALICIOUS

PDF

68.8 KB Created: 2021-09-29 02:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 67266639fd431e59a8a1f52861dfd0c0 SHA-1: b9603faa4b9a0e6a3ede116cea4e6c16f4aa7a81 SHA-256: addf3288331799f0d497ba1f6d1c8a2ff0afc326f58eedf14fee886cd3d695ef
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only content and embedded clickable links. The heuristic PDF_IMAGE_LURE indicates a common tactic where a screenshot is used to hide malicious links. The numerous embedded URLs, many pointing to compromised CMS uploads or disposable hosting, suggest an attempt to redirect users to malicious sites for credential harvesting or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are strongly indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://drafthe.ru/uplcv?utm_term=lightroom+cc+mod+version PDF link annotation
    • http://shiokuda1.com/contents/files/2388388994.pdfIn PDF document text
    • http://embeddedhr.com/ckfinder/userfiles/files/40447689639.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/161355ca86fe60---zozavimifasan.pdfIn PDF document text
    • https://montpellier-business-plan.com/mbp/upload/images/images/upload/ckfinder/lefelurazexolifekeka.pdfIn PDF document text
    • https://linker.tw/files/14657355068.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/79783847359.pdfIn PDF document text
    • http://bantinnhadat.com/users/files/ludimibusovivevorutuf.pdfIn PDF document text
    • http://ih-consultant.com/ckfinder/userfiles/files/wonibiti.pdfIn PDF document text
    • http://7m-shop.com/userfiles/file/49023847568.pdfIn PDF document text
    • https://castilloexterior.net/ckfinder/userfiles/files/saguxuvesobonetunagip.pdfIn PDF document text
    • https://st-stephens-church.com/upload/File/datudiraziroguzuxotav.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/161482855bbece---lilexaluzo.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/sumadefukasozijusig.pdfIn PDF document text
    • https://sweetestspaparty.com/wp-content/plugins/formcraft/file-upload/server/content/files/161422650f2eed---rogikekojipegoxi.pdfIn PDF document text
    • http://norilsk.torbay.ru/images/uploads/file/79099348945.pdfIn PDF document text
    • http://dom-2000.ru/ckfinder/userfiles/files/zogasitobozoke.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b3af1d3ef7---8119636167.pdfIn PDF document text
    • http://letnipohar.cz/upload/file/jujemaku.pdfIn PDF document text
    • http://arcstema.com/userfiles/files/kalotabusinomarabazewawe.pdfIn PDF document text
    • https://etest.vn/app/webroot/uploads/files/kupivegesusaxogovekibipoz.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/77k4e79aokfpq2hmoekoetcvt4/3149002736.pdfIn PDF document text
    • http://papaicountrylodge-longstay.com/user_img/files/jitufigewazafoletapi.pdfIn PDF document text
    • https://cebubigsellers.com/userfiles/file/44034882681.pdfIn PDF document text
    • http://kd-council.com/upfile/files/tukipixam.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/95385491816.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_off0000b29d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB29D 13944 bytes
SHA-256: 52011c823a33768d02c48e804b3cbe578ed9c692c24e454934f1758c1f203b5d
font_01_sfnt_off0000d56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD56F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ed86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED86 10632 bytes
SHA-256: b1939c6298b28f19e76c134003303d8b9f52ea546c28e9457119987fd91f651b

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