Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c6e2ebacd5822d…

MALICIOUS

PDF

65.1 KB Created: 2021-10-03 18:59:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: e51ca632d436cf3e2c79c1ba0c480549 SHA-1: f154264dd471a564b56b4ab2030efd3a06598a40 SHA-256: 37c6e2ebacd5822d9a4307ca8a2aad6e0e2dc9e45e41b1b577ff3a54b9371d6c
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous external links, many of which are hosted on disposable domains, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's intended to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5956

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://archism.ru/uplcv?utm_term=find+one+value+of+x+that+is+a+solution+to+the+equation PDF link annotation
    • http://ffarchitettura.it/userfiles/files/75664809929.pdfIn PDF document text
    • https://camphacement.vn/upload/files/ximik.pdfIn PDF document text
    • https://humanistbeauty.com/wp-content/plugins/super-forms/uploads/php/files/upljt85c29332560h0l779572q/nitubojodanu.pdfIn PDF document text
    • https://www.rougeindigo.com/ckfinder/userfiles/files/sumutivizunironozetig.pdfIn PDF document text
    • http://dohertylaw.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gawawut.pdfIn PDF document text
    • http://ricettebiagi.it/uploads/assets/file/86835853502.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/9fec8f16d7ddcc7ce456d6b0e85a8619/94682027631.pdfIn PDF document text
    • http://fornacedelia.it/userfiles/files/lipujumoxobifibup.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/zetafar.pdfIn PDF document text
    • http://zgkimsteszew.pl/img/upload/files/xabinelubi.pdfIn PDF document text
    • https://alihuata.com/userfiles/file/52828872690.pdfIn PDF document text
    • https://anbuadidravidarmatrimony.com/ckfinder/userfiles/files/33323384786.pdfIn PDF document text
    • https://maviet.vn/upload/files/94731465966.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/16150b5504669a---fikewozidefulam.pdfIn PDF document text
    • https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/83121213320.pdfIn PDF document text
    • http://xn--80akazwaeiw.xn--p1ai/editorfiles/file/78362307953.pdfIn PDF document text
    • https://istanajpdua.com/contents/files/13790461740.pdfIn PDF document text
    • http://onlinecommerce.bg/uploads/pages/files/57696232869.pdfIn PDF document text
    • http://aexpress.lv/index/images/up/file/64822447321.pdfIn PDF document text
    • http://rkenterprisesonline.com/FCKeditor/file/69181556288.pdfIn PDF document text
    • http://balmybnb.com/t/tutorfirm/uploads/ck/files/sasatot.pdfIn PDF document text
    • http://falconartistmanagement.com/ckfinder/userfiles/files/tofekepubevisob.pdfIn PDF document text
    • https://tumujerrusa.com/userfiles/lodulezabesi.pdfIn PDF document text
    • https://www.ciabrini-immobilier.com/wp-content/plugins/super-forms/uploads/php/files/lcqhs61anqmvv7odeeat3dnvdg/35953532967.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_off0000b2e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2E1 15976 bytes
SHA-256: 3f85336f457c90ff2502c96efda5199d4819bbd12ad2e5406dcb4fe8f3db4c36
font_01_sfnt_off0000db4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1