Malicious PDF — malware analysis report

Static analysis result for SHA-256 29c5b3e44316ca98…

MALICIOUS

PDF

90.4 KB Created: 2021-08-17 16:43:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-01
MD5: a7d839918ea63f9acebf84ca6fc77ea4 SHA-1: ad483a084896e422ca7e153fa2351b16a177b532 SHA-256: 29c5b3e44316ca98422a4e89bfd7b738874af3cb5d94f76fdc3c06e3b5a37dd6
156 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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
  • 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
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/2d9c559abc55e053f67d7b660be31e17/53610295131.pdf In PDF document text
    • http://popnmusic.fr/userfiles/file/wozalimoxizax.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607dba70a5c01---zopusetuvomopimir.pdfIn PDF document text
    • https://ristovski.mk/public_html/upload/userfiles/file/mimukatufigivoxegas.pdfIn PDF document text
    • https://beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/2b9689def10daf58afb5b2d7c88f883e/44675829994.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610ae3a36ba39---dibakakikubite.pdfIn PDF document text
    • http://lyzebrno.cz/userfiles/file/79804596965.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160943de0bd744---tifabaxemigaser.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608428dd23e56---diraxovivufovisave.pdfIn PDF document text
    • http://gleneaglehoa.org/images/file/mitirove.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/60k2k1499bnf5p7vfjbs69dke3/xeruzulenopiboro.pdfIn PDF document text
    • http://kco.su/userfiles/file/72206284100.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/3de42d94d649b2b3d56e1e1f322c0708/lizevakejo.pdfIn PDF document text
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jurirekabir.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5a242680fc---34192990665.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/9a0ce8f68029c2ca606ef19e387a9fa7/sukipetexumuxagurog.pdfIn PDF document text
    • https://airshow-bg.com/file/82966518236.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/gomunogoxepeteg.pdfIn PDF document text
    • http://eventclub.pl/userfiles/file/85526140280.pdfIn PDF document text
    • https://roweryelectra.pl/app/webroot/uploads/file/1627588588515.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/19852123912.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae0b485cc29---bigijiviv.pdfIn PDF document text
    • https://home-consult.lu/userfiles/files/92799163410.pdfIn PDF document text
    • https://kompaspt1.com/contents//files/56168461926.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=ludo+star+2+ios+hack+unlockerPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4F3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD0A 10736 bytes
SHA-256: 7892387a7437ef879a73b2416128c72c8ce70efbed93b8b95187e451584f2a75
font_02_sfnt_off000115b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115B7 17512 bytes
SHA-256: 8dc7ae4812c7e3c9e2a37e790e923fc00408c635e252e4f43622eb91f8c4c4e6
font_03_sfnt_off000143e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x143E6 16092 bytes
SHA-256: 9d5144547e0b729630886a3ad3ce48e7da84b0115899dd9c2390406af6f0fecd