Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddd29907a6b61990…

MALICIOUS

PDF

63.5 KB Created: 2021-08-27 22:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 2d684f78d06a00b0a99b59bab4ef5796 SHA-1: 678da63e535fc3070125da65ea4f97fbc5c9afc9 SHA-256: ddd29907a6b61990479555e8c9f1f9874fde6b0d0b3b965ba0b96aad7a89141d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan threat. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload storage, likely to host malicious payloads or redirect users to phishing sites. The document body is unreadable, but the heuristics strongly suggest a malicious intent to lure users to external, potentially compromised, resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6910

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://creativeindustries.ru/uploads/userfiles/file/konurozafazefijobeloma.pdf In PDF document text
    • http://tfh-filter.hu/_user/file/68211519140.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/selagago.pdfIn PDF document text
    • https://auf.vn/wp-content/plugins/super-forms/uploads/php/files/q3btpe161b9f4qlnm5q7aiaf70/buxagusuvazarixe.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f786e0057a---85470203559.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16091c212de3d1---fefewedox.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079725f387fa---favalelokodinaxow.pdfIn PDF document text
    • http://www.whirlpool-beachcomber.at/wp-content/plugins/formcraft/file-upload/server/content/files/160c64d27dea09---75899423069.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160925cad2d77b---11804770910.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/54160319265.pdfIn PDF document text
    • https://aspit.ro/imagini_ws/31090631770.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/4cq9oer7p6rav1nahr6pgv5ev1/24641408567.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608774d515430---tumejojido.pdfIn PDF document text
    • https://signatureshreyas.in/userfiles/file/99880213466.pdfIn PDF document text
    • http://zae.me/datafiles/file/datiwovavig.pdfIn PDF document text
    • http://drentmedischadvies.nl/uploads/files/wutevodutolivudipujoki.pdfIn PDF document text
    • https://autotrilogy.com/wp-content/plugins/super-forms/uploads/php/files/3b97ba1355f31865e29eb05e63e643fb/60088990284.pdfIn PDF document text
    • http://kapelski.pl/userfiles/file/tuwuxuzefetitaforimapafes.pdfIn PDF document text
    • https://infiniteprospects.com/FCKeditor/file/88048754288.pdfIn PDF document text
    • http://gesundimjob.at/images/content/files/sudoxod.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qhkgpqofdvgs0a4dmov2eknjq5/7372038460.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/9a84f447eb8029316995dab438d99eb8/9528744096.pdfIn PDF document text
    • https://augsburger-dartliga.de/uploads/file/bawivurori.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1610ff0964c379---bidiximivujen.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/batotonomo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=blaine+anderson+real+namePDF 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_off0000bd63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBD63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d575.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD575 14884 bytes
SHA-256: 91a22c80bd00a08c3d7471c592f772ffdfd549d6ae57806fd8929e98df6ec453