Malicious PDF — malware analysis report

Static analysis result for SHA-256 e22df616ec2af731…

MALICIOUS

PDF

83.3 KB Created: 2021-09-02 07:18:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: c0e9c866d5b5229954b8d9383cb210f8 SHA-1: b1257c54503c3e63eed551e0768dc5b5be63fc81 SHA-256: e22df616ec2af731c23739d008d99ea67a6252e16a17c3e40fb2d14591f3b111
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to various websites, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be directing users to potentially malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://tysons-cafe.com/uploads/files/lidezagoguwugujeleme.pdf In PDF document text
    • http://lateonsettay-sachs.org/userfiles/file/48885759055.pdfIn PDF document text
    • http://www.melodypods.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa67fc034b3---nugekemazefuvobuv.pdfIn PDF document text
    • https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/160877b7980348---vedipovudi.pdfIn PDF document text
    • https://uangraja.com/contents/files/77829428964.pdfIn PDF document text
    • http://abwvictory.com/uploads/files/79534078516.pdfIn PDF document text
    • http://sacmacbook.net/userfiles/file/fafawutefogafakijawubiwa.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b2773260a---18341280356.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/94429604287.pdfIn PDF document text
    • http://charivne.info/images/file/45331825432.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcf9777fcd---nabipuzevatuvedafobodizom.pdfIn PDF document text
    • https://srp-galabau-rostock.de/wp-content/plugins/super-forms/uploads/php/files/k5paqgf4bcvshc8k1eksv8hhu6/99234355420.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/rolibrvp05hcpef4e40m9mrdm4/25386474069.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/6bd4673e4bb0671e527327130b116b4c/74595282057.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084daf8c9771---80790067009.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/danilasupaj.pdfIn PDF document text
    • http://jeyadhurgatemple.com/userfiles/file/giwagebuxuxe.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1dba51574---sibugosavopetudud.pdfIn PDF document text
    • http://xhzhengli.com/upload/35935046436.pdfIn PDF document text
    • http://bachova-terapia.sk/images/file/79492936179.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=how+do+i+remove+search+suggestionsPDF link annotation
    • https://rt9.rspo.org/ckfinder/userfiles/files/vewutusotewi.pdfIn PDF document text
    • 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000da5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA5E 20284 bytes
SHA-256: d76382805e92a699dbada39c12d09fe6c9b54aa8867c51c9350faaeeeba26b95
font_01_sfnt_off00010ead.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EAD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000126c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126C4 11012 bytes
SHA-256: 39ccec8e13230c7e9183fa8ccc2fac6b13416fce277232fd9973e6074152473e

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