Malicious PDF — malware analysis report

Static analysis result for SHA-256 2f72eb8880835e98…

MALICIOUS

PDF

69.5 KB Created: 2021-09-17 02:36:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 429a9c6de2088a4b3b0eca258f10ab92 SHA-1: f570eb612f16833176fdfa12dc9615c126e20ef1 SHA-256: 2f72eb8880835e98aa21eae4ce83edbec4e0dbdffc9d5a831ecd097a9b65051e
176 Risk Score

Malware Insights

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

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable links. Heuristics indicate it's a link farm hosted on potentially compromised or disposable domains, designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely leading to a secondary download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

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 69 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 http://langfordfinancialservices.com/userfiles/files/dibinedawadeb.pdf In PDF document text
    • http://alarcon-v.com/editor_upload_image/file/xerukirizogidojuxe.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/102ccd60aeb80fb35568798daefbcf40/45795091318.pdfIn PDF document text
    • http://marinda.ru/pics/images/file/dugufeletuniva.pdfIn PDF document text
    • https://fidelishospice.com/ckfinder/userfiles/files/nivesujukadadifakekob.pdfIn PDF document text
    • http://casaperferiesantamariagoretti.com/writable/public/userfiles/file/benozatokom.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1613e615e7e6d7---58153352893.pdfIn PDF document text
    • https://coluer.ir/documents/file/70071800964.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/nexavika.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16139a280578f9---31285332858.pdfIn PDF document text
    • https://ruiguoex.com/upfile/files/2021/09/03/kosukobobiw.pdfIn PDF document text
    • http://lingeriedediva.com/UploadFile/file/2021091415154273499.pdfIn PDF document text
    • http://razredna-nastava.net/files/50084191169.pdfIn PDF document text
    • http://originalbau.hu/imagesfiles/tapexoseruxapanixurin.pdfIn PDF document text
    • http://grupopiscis.com/upload/files/jatororisawam.pdfIn PDF document text
    • http://bezpiecznamlodosc.org/files/file/54770921032.pdfIn PDF document text
    • http://aurastaffing.es/upload/file/lufebatakaj.pdfIn PDF document text
    • http://naturallabs.de/userfiles/file/bitisunaw.pdfIn PDF document text
    • http://aaronandanthony.com/userfiles/files/48661831704.pdfIn PDF document text
    • http://bishnutoursandtravels.in/userfiles/file/43979511170.pdfIn PDF document text
    • https://profession-your-dr.com/uploads/files/202109091504375497.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/69578682081.pdfIn PDF document text
    • https://aspirans.com/files/file/totunej.pdfIn PDF document text
    • http://namngonviet.com/user-/files/60850568019.pdfIn PDF document text
    • http://artdealer.vn/upload/fckimagesfile/f8cff7670a47091a51445a3600fc873e.pdfIn PDF document text
    • http://cloverdiamond.com/file/lefogugujokorilo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=encouraging+words+that+begin+with+mPDF 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_off0000b44f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB44F 13876 bytes
SHA-256: 9d3f09e61cc3510c7aa14b05ed643c1f3fc925458e6f30036e7c9e685776db95
font_01_sfnt_off0000d666.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD666 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ee7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE7D 11080 bytes
SHA-256: 3f9832a2007667674f67773393a4d7f33993a0d805106e3fd5ef3254025eea42

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