Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddc982cca5f49956…

MALICIOUS

PDF

64.0 KB Created: 2021-09-27 08:57:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fc4ad7da75c6b5afe88f673b628224e7 SHA-1: ad6e720ddba87696f79e52677b579a55a3988e96 SHA-256: ddc982cca5f49956dbee1a97e50a32eb8d770e1003b23d8229434666f3583a0e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ClamAV and ML classifiers, exhibiting characteristics of a phishing lure. Heuristics indicate it's an image-only document with a click-outward action, typical for directing users to malicious sites. The document contains a link farm pointing to compromised CMS uploads and disposable hosting, suggesting an attempt to distribute further malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7407

Heuristics 6

  • 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 1 text block(s), carries a click-outward action, and is only 64 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://inwebjor.ru/uplcv?utm_term=mulan+2020+sub+english PDF link annotation
    • https://fullhousetourism.com/UploadFiles/file/20210916184850198.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/77023191691.pdfIn PDF document text
    • https://lorenzonimmigrationlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613977e0a2192---96384819717.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161365af34ed8f---lesarenuzifidododu.pdfIn PDF document text
    • http://ecovn.vn/uploads/news_file/42706194074.pdfIn PDF document text
    • https://lemondedelaura.com/userfiles/file/kepujoxo.pdfIn PDF document text
    • https://aspirecambodia-edu.org/userfiles/file/majar.pdfIn PDF document text
    • https://pharmawell.eu/ckfinder/userfiles/files/20923507184.pdfIn PDF document text
    • http://easyliveconstruction.com/ci/userfiles/files/zulez.pdfIn PDF document text
    • http://businessvaluationapp.com/fck_files/file/49435836829.pdfIn PDF document text
    • http://iktoktatas.hu/files/file/pifijigiwaxavakivoj.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dolenewowurabolu.pdfIn PDF document text
    • https://lionkingbali.com/uploads/file/97094445176.pdfIn PDF document text
    • http://stalmont.eu/userfiles/file/85042630804.pdfIn PDF document text
    • https://www.nstoplana.rs/ckfinder/userfiles/files/95345945135.pdfIn PDF document text
    • http://whatcanidoforyou.eu/publish/file/gitejejikulilomivelax.pdfIn PDF document text
    • https://dcoderesearch.com/uploads/bigolisifosijiso.pdfIn PDF document text
    • https://crcnueva.naturasoftware.com/uploads/images/files/rasuxomajiwigen.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/161352dc2c201f---riwokuparijituxokalunus.pdfIn PDF document text
    • http://zabbeleecooking.com/ckfinder/userfiles/files/40918636831.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132833796fc3---zopoxelez.pdfIn PDF document text
    • http://holmeslawfirm-iowa.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/98732102586.pdfIn PDF document text
    • https://zilalcooling.com/other_files/File/40646962705.pdfIn PDF document text
    • http://rapabzenec.cz/obrazky/files/robetuxogusolazepadod.pdfIn PDF document text
    • https://soudurelausiere.com/upload/editor/file/jutob.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000afd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFD5 14616 bytes
SHA-256: 88a8895406474bb15bc791ef8f2873727a2076c4791022cb199be8f8785524dd
font_01_sfnt_off0000d46a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD46A 10544 bytes
SHA-256: c1882dd308a83f1303d15cbfcb34eb6201f65484bffe6f05b0764ff0831b1820
font_02_sfnt_off0000ec64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC64 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1