Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e277440e75655f1…

MALICIOUS

PDF

73.0 KB Created: 2021-09-03 21:01:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 083e9e4e8eea48a470aebf5396884126 SHA-1: 2be178e15c6927bdb8cba3d277cfa0f58479f625 SHA-256: 1e277440e75655f16dd1c9c877d427455dbce323402225325c5c3363361318c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to compromised CMS upload directories, suggesting a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a link farm designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5901

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 http://anhbanglaw.com/userfiles/file/mutidepekikel.pdf In PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/791qmrlvahrhhensamua9dgja5/38871366268.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e3033e306f0---73403619345.pdfIn PDF document text
    • http://askort.pl/Upload/file/wumexotozolativuxovog.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609bbfa36d268---koxuxexetosivilow.pdfIn PDF document text
    • http://nsfeed.com/_UploadFile/Images/file/segogomoxojojeforela.pdfIn PDF document text
    • http://unipell.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b183f1b5fb3---4234118278.pdfIn PDF document text
    • http://beta-rc.com/upload/files/lizudemijuturekixot.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072a723aa8d7---xabopiwitatusosad.pdfIn PDF document text
    • http://a-swiss.com/upload/userfiles/file/6834542063.pdfIn PDF document text
    • https://rosenstein.lu/userfiles/files/piwolebadelitero.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/kpp63t9vd2a0bon6hnjgvhtb72/37406373131.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a1fddbebc36---8019800748.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/161040c31ce9d4---92244675328.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/0429cad10fd9e74b30019bac4daf355e/tuwilononivarenasonubif.pdfIn PDF document text
    • http://oreade-breche.fr/userfiles/file/11779593444.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/b992b79677d6a778c103a13461fd0ccd/88841198349.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606f25f8a6081---71333220719.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/puxezovaroligitex.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/7gkme05ufpgq3e2mr82e6g99e3/dofosoxuregivitafonuwajok.pdfIn PDF document text
    • http://orlickachata.cz/files/files/76266519924.pdfIn PDF document text
    • http://indianspringhomes.net/userfiles/files/21934281659.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=graphing+motion+worksheet+middle+schoolPDF 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_off0000d22a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD22A 11180 bytes
SHA-256: 9d2abaa973b9626d17f96e42fe32ee446f79d977b5c4126c18b4045b9e338d6f
font_01_sfnt_off0000ec00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC00 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1