Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcf1dc12c2a24b1d…

MALICIOUS

PDF

64.0 KB Created: 2021-09-07 00:03:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 92912b682b9bf34fab7ce57ddb75c395 SHA-1: bb6e6af4796d4c5ac83ab7440545ea5296604870 SHA-256: bcf1dc12c2a24b1d79d7dcae042d059f395a9b6958455f01a067ced00b830aaf
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs point to compromised WordPress sites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The primary attack pattern involves directing users to external URLs, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8532

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://laborke.ru/uplcv?utm_term=google+pdf+viewer+app+uptodown PDF link annotation
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/107694ae0b15ec38706874aa8160aef1/13143454123.pdfIn PDF document text
    • https://finestblogger.de/wp-content/plugins/super-forms/uploads/php/files/eodof3r2rsn66n0024jpc500u2/zebadum.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/88785239786.pdfIn PDF document text
    • http://goldnumber.info/userfiles/file/18103567406.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/paresoxopavub.pdfIn PDF document text
    • http://escuelasfutbol8.com/docs/files/ramunekuxizosavumoj.pdfIn PDF document text
    • https://grand-forge.ru/wp-content/plugins/super-forms/uploads/php/files/0b06647432de657ad437e46798bf0dba/gijeferojoj.pdfIn PDF document text
    • http://o2ashop.com/ckfinder/userfiles/files/siwuregofok.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/11837437069.pdfIn PDF document text
    • https://skyzoan.com/cake/beta/userfiles/file/wibetodaximokibezas.pdfIn PDF document text
    • https://texasbordervolunteers.org/userfiles/file/guwifekatelomebivir.pdfIn PDF document text
    • https://jetzterstrecht.hamburg/wp-content/plugins/super-forms/uploads/php/files/tv6o3fml5frul062uc215h5gi1/46771793394.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/leganelo.pdfIn PDF document text
    • https://mytutr.com/wp-content/plugins/super-forms/uploads/php/files/5c4cfe3659515075ea13e4ac736ba3f3/91746237711.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/gvla4k6v9jd07g6jc5787co3s2/13024705021.pdfIn PDF document text
    • http://namngonviet.vn/user-/files/66733833527.pdfIn PDF document text
    • http://chandigarhdatarecovery.com/files/file/78928430586.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/68463172624.pdfIn PDF document text
    • http://besteva.com/upload/files/larisilogop.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613447ae01419---zagolobifutosujalet.pdfIn PDF document text
    • http://hoangminhphatkorea.com/webroot/img/files/zexegofenebena.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/1608cf566e240b---dutaman.pdfIn PDF document text
    • https://aokman-drive.com/d/files/rasimo.pdfIn PDF document text
    • https://abzesolar.com/uploads/files/49906480316.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160794b346efae---46979548405.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160fe20fdab305---fulazuxidelovewodozi.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d831.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD831 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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