Malicious PDF — malware analysis report

Static analysis result for SHA-256 705c41d8cdddb9b2…

MALICIOUS

PDF

40.0 KB Created: 2021-09-16 06:00:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 162e70e57f517693172eb4d22a0a1b6f SHA-1: ab43a2b4bd4c7f9e407a1a00c3c6a7f9e039c07e SHA-256: 705c41d8cdddb9b2fc6620dc4045cbaded63ce9614a396b51b21fe61241a470f
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains numerous embedded URLs, many pointing to disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF_IMAGE_LURE heuristic indicates a screenshot was likely used to obscure a clickable link, a common tactic for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9455

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
  • 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 40 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://medvor.ru/uplcv?utm_term=judi+slot+77 PDF link annotation
    • http://nusratali.com/userfiles/files/bifelilupebegikozes.pdfIn PDF document text
    • http://sgrdinstitutionspandher.org/sgrd/userfiles/file/voraxizexun.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/dfa6a8321206e1cd017dbf7f9d2600d2/navej.pdfIn PDF document text
    • https://cakkue.com/contents/files/nuweme.pdfIn PDF document text
    • http://clerus.hu/files/file/nedeza.pdfIn PDF document text
    • http://torgoborud.org/images/file/158224147.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/78614405867.pdfIn PDF document text
    • https://www.hasmow.com.au/application/third_party/ckfinder/userfiles/files/17862613124.pdfIn PDF document text
    • https://ekinyalitim.com/depo/sayfaresim/file/zojudaxapuzi.pdfIn PDF document text
    • http://lejuriste.ru/files/file/menukawakefekapi.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/1003084194.pdfIn PDF document text
    • http://xn--80aafkqcanfpgnhbng3b5i9a.xn--p1ai/pict/file/ximopowo.pdfIn PDF document text
    • https://yourownadviser.com/ckfinder/userfiles/files/99061341214.pdfIn PDF document text
    • https://bimstudioinc.com/media/files/89037995749.pdfIn PDF document text
    • https://leganordavigliana.it/uploads/file/46131681353.pdfIn PDF document text
    • http://caribsplash.org/wp-content/plugins/formcraft/file-upload/server/content/files/161334927d9e02---sedovaduxasulimofufiwe.pdfIn PDF document text
    • http://thomasgearon.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/97188549356.pdfIn PDF document text
    • http://razaviota.ir/basefile/razaviotair/files/tezixonakarozazidiga.pdfIn PDF document text
    • http://highspiritsmusic.com/ckfinder/userfiles/files/zimipesovulejofuripaf.pdfIn PDF document text
    • http://gugugroup.com/userfiles/kimakano.pdfIn PDF document text