Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee02e9494b25ad49…

MALICIOUS

PDF

67.4 KB Created: 2021-09-28 00:44:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 707544ecba759d84557375657a06dd7b SHA-1: 8d218003a90bc964c677bc930d88f8093cbd4b6d SHA-256: ee02e9494b25ad49e1e9aa76a9633b3d4212f7e2431e9dbf8b200a075e0c4106
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure due to its image-only nature and embedded clickable links. The heuristics indicate it's a link farm hosted on compromised CMS uploads, likely directing users to malicious content or further phishing attempts. The ClamAV detection and ML classifier strongly support its malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9966

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
  • 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 67 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://www.gitialiganjlko.org/ckfinder/userfiles/files/5000263533.pdf In PDF document text
    • http://makairways.in/home/makairways2017/public_html/dowalumniusa/ckfinder/userfiles/files/sikodoforoj.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/1ht3dh0snff0lof5kp9b1svct1/44893171633.pdfIn PDF document text
    • http://kfbma.org/files/fck/file/17954741607.pdfIn PDF document text
    • https://pkmoscow.ru/ckfinder/userfiles/files/39970624623.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/sapinu.pdfIn PDF document text
    • https://www.highettmetal.com.au/application/third_party/ckfinder/userfiles/files/vubuxemukijunavuzadajek.pdfIn PDF document text
    • https://fatheragneliti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615236e284225---mogajixari.pdfIn PDF document text
    • https://tahitotfalu.hu/ckfinder/userfiles/files/11818574085.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/vusomanu.pdfIn PDF document text
    • https://mimpiindah1.com/contents/files/17784776676.pdfIn PDF document text
    • http://toitureetfacade.fr/data/Files/zanegejubivevolusixofo.pdfIn PDF document text
    • https://northcoteplaza.com/userfiles/file/pifogikoper.pdfIn PDF document text
    • https://mantyobras.com/userfiles/file/72433058201.pdfIn PDF document text
    • http://annassteen.com/ckfinder/userfiles/files/lubiwebotesigusuzidobaje.pdfIn PDF document text
    • https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614eb46dadbe1---68245940314.pdfIn PDF document text
    • https://dursunguney.com/userfiles/files/wagolej.pdfIn PDF document text
    • https://amadesafar.ir/basefile/amadesafarir/files/xoraxuxufixipafozup.pdfIn PDF document text
    • https://kltccompany.com/ckfinder/userfiles/files/fapomupijaxosazuziv.pdfIn PDF document text
    • http://airzo.net/userData/board/file/nefedeligitarinivosobok.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16135e00913681---babexolefuvop.pdfIn PDF document text
    • http://www.sarajevo-inn-grunewald.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138088235335---wunowixujakabifuxojawax.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=minecraft+pe+hack+clientPDF 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_off0000ae27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAE27 14108 bytes
SHA-256: 42de57567b48da094b7fe020ec63f00ec68634e62ce112055ca3c14a3170da3f
font_01_sfnt_off0000d12f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD12F 10372 bytes
SHA-256: 28b5043423c4ea5e865b586610ad82cc69894ea90bff5749cd5a55e32d3680db
font_02_sfnt_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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