Malicious PDF — malware analysis report

Static analysis result for SHA-256 69e88c4b729875c7…

MALICIOUS

PDF

87.3 KB Created: 2021-09-16 03:48:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 564fbe58938d592d769fc846431a0a8a SHA-1: a3d9b4bcdd61f27e422fc51a80ff31792c881561 SHA-256: 69e88c4b729875c79ae8b9036f5dd77e42554f7909c47236e8931e12e19687eb
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The presence of these links suggests an attempt to lure users into clicking them, potentially for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4566

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 https://smidgel.ru/uplcv?utm_term=best+web+based+messenger PDF link annotation
    • https://beaumont-residence.com/wp-content/plugins/super-forms/uploads/php/files/35dnuharioircn4kcv0lepa2ol/dipitavesivelujuf.pdfIn PDF document text
    • https://lifesmart.lifesmart.ro/ckfinder/userfiles/files/22707056273.pdfIn PDF document text
    • https://businesslife.com/content/file/20651348913.pdfIn PDF document text
    • http://nbkhjc.com/uploads/202109/file/210904131941425247glvmng4793ea.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/dususixax.pdfIn PDF document text
    • https://ecableapp.com/FCKeditor/FCKimgUpload/file/91322177816.pdfIn PDF document text
    • http://kbidc.kr/upload/editor/file/1630491261.pdfIn PDF document text
    • http://zh-huaxun.com/uploadfiles/files/7518497949.pdfIn PDF document text
    • https://audreyheselmans.com/_files/file/7030959320.pdfIn PDF document text
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/psi5hdbopt2kkv8tlvllfsmvml/nigexivawagaveteme.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/161399c0ea6585---66185028026.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/64046167864.pdfIn PDF document text
    • https://delta-relay.be/userfiles/file/48188313521.pdfIn PDF document text
    • http://emotionpicturesfestival.gr/userfiles/file/ninubodafitexevubufafi.pdfIn PDF document text
    • http://ever-pioneer.com/upload/files/koxabubu.pdfIn PDF document text
    • https://suacuachuyennghiep.com/uploads/files/nidobo.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/5e324beb2057275594d9caa81a0bfe45/59757140551.pdfIn PDF document text
    • https://gemma.lucien-sv.info/uploads/files/613147d01f44b.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/31841457329.pdfIn PDF document text
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131425fe686d---34651980998.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/161306de3b0b11---xizebutewuwidamatig.pdfIn PDF document text
    • https://bczenekar.hu/files/file/22301266035.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/nuburefevibone.pdfIn PDF document text
    • https://motoquadro.de/userfiles/file/47540873604.pdfIn PDF document text
    • http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1613fdeeba85b1---xorolopupozefifaxofabapun.pdfIn PDF document text
    • https://travels-ukraine.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131894faa13e---zuvojemexesexubupatereb.pdfIn PDF document text
    • http://perfectsextherapy.com/public_html/userfiles/file/56206544104.pdfIn PDF document text
    • 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_off0001100f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1100F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00012821.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12821 20864 bytes
SHA-256: 66113ae5db33bd7d10fe06b73519923c524fe71dbdcfa168a1968a966fb1a444