Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e55f76f8587d688…

MALICIOUS

PDF

62.2 KB Created: 2021-10-01 08:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 22e7d39f3e848b581ae11ac57c85eb77 SHA-1: 73b0a433dbc5f019f4e98bd3d5be783d08f855e2 SHA-256: 7e55f76f8587d688581b0ec71336a9e63cc83fc95ed40d06ad33437ea5b7df8e
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file is identified as malicious by ClamAV and exhibits characteristics of a phishing lure. It contains a single image, typical of a screenshot, with clickable links pointing to various domains, many of which appear to be compromised WordPress sites. The document's structure and the presence of numerous external links suggest it is designed to redirect users to malicious content or initiate downloads.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2662

Heuristics 6

  • 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 62 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
  • 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://euroteam.vn/ckfinder/userfiles/files/zuvexuvewuvukumodijaxejuj.pdf In PDF document text
    • https://www.disbel.es/ckfinder/userfiles/files/jemaletifezezovewa.pdfIn PDF document text
    • https://kamhosting.nl/ckfinder/userfiles/files/xotesumusovijaropirulo.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/teluvigasikotanon.pdfIn PDF document text
    • http://jlssj.com/qianzi/upfile/case_editor/file/71003505482.pdfIn PDF document text
    • http://asesorialuishervas.com/wp-content/plugins/formcraft/file-upload/server/content/files/161309554b2c6f---88296357972.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/48244366726.pdfIn PDF document text
    • http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614f7df905d53---bizijumufuzeveluzopomesal.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/ffa3963d04e3f6760da332555f9f4cfb/13127080581.pdfIn PDF document text
    • https://wickedcheesy.com/images/file/lolunifalivenujatada.pdfIn PDF document text
    • http://ledseoul.com/userData/board/file/8156820064.pdfIn PDF document text
    • https://estduquebec.com/scripts/php/xenocode/lib/ckfinder/userfiles/files/paxeropovogipeva.pdfIn PDF document text
    • https://menu2uplus.com/images/file/60520865361.pdfIn PDF document text
    • http://avvocatogiuliani.it/userfiles/files/birosanix.pdfIn PDF document text
    • http://z500.si/files/31159784834.pdfIn PDF document text
    • http://saigonradio.com/userfiles/file/52881121989.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/diwatepuwutapov.pdfIn PDF document text
    • http://sun-tes.ru/files/file/46350798452.pdfIn PDF document text
    • https://tdfstore.it/file/14809870797.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/nipuwumujonitipuzep.pdfIn PDF document text
    • http://elisa5888.com/shopadmin/upload/files/wutabu.pdfIn PDF document text
    • http://cityfate.com/files/files/74626208927.pdfIn PDF document text
    • http://gardens-spa.com/user_pict/file/tudifilisilepu.pdfIn PDF document text
    • http://chataphan.com/file_media/file_image/file/91342801599.pdfIn PDF document text
    • https://vargyasnekonyveles.hu/kepek/other/file/sowuwimitupag.pdfIn PDF document text
    • https://pelletier-tp.fr/ckfinder/userfiles/files/sudate.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=contract+killer+android+game+downloadPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b487.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB487 10752 bytes
SHA-256: dddca7de5e269eeb327863e78463ba8dc93f4afdbd85e0e3fbe99416390dcf48
font_01_sfnt_off0000cd17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD17 13808 bytes
SHA-256: b15cc8c075f2429b4b7bf8ff74b9a13fb409dc130b076827fbae655fbe2f3dd6