Malicious PDF — malware analysis report

Static analysis result for SHA-256 76ae18ee998de465…

MALICIOUS

PDF

97.6 KB Created: 2021-06-21 01:42:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ddda68625674d418522c803eb6b3fe0e SHA-1: 65c9b936a1228c0bbbe0450431fe124a9433ebcc SHA-256: 76ae18ee998de4657478f9e4465fcd96b79969bffe283a056f7ac3913424dbb8
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 0.9995

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://accesoriosalmayor.com/images/userfiles/file/21352462482.pdf In PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/np39aqir58190b0gnp85op2t0i/75255231792.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3d2558cd41---5401595317.pdfIn PDF document text
    • https://www.schroedersales.com/wp-content/plugins/super-forms/uploads/php/files/915781090750cc9b74a7e7688b19ef5c/desujugimo.pdfIn PDF document text
    • http://renovator.cz/files/file/gevodeduguzewu.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16083bf5e699a5---77583826119.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/0975d7a008283580838514f8ed8ef557/dojexewetovoretovo.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/72hk9lpj4qjfpps64rj7l7nir8/47165186562.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/v1lj0gc462c5t7vlij59sp9938/dofavajefukogojurediru.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/c4b81a508a316cb38ca20355d3c79cfc/bogolixepawegusajufi.pdfIn PDF document text
    • http://diamondsnspurs.com/clients/12200/File/7233632756.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d5663da62d---29000330453.pdfIn PDF document text
    • https://ivanamihic.com//files/xixebikuduxalalulu.pdfIn PDF document text
    • http://beateromer.com/bilder/file/bepikezegukategeg.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/93205598191.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=jeepers+creepers+1+tamil+dubbed+downloadPDF 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
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_006_off00015962.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x15962 19096 bytes
SHA-256: b8374bc28cdf61c914bfc7b97bafc6d92cb2470dc0e4198a2d4465bc6a435de8
font_00_sfnt_off000104db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104DB 3208 bytes
SHA-256: 8fe9c360a4f43a9199ef9ada077b8329ec88db9ac86a4a27790a02056db044ce
font_01_sfnt_off00011077.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11077 5492 bytes
SHA-256: cfb339bde6764eea23ad8b0b3e98419a1d483128452160e90b8c6c3d26e0f842
font_02_sfnt_off00012316.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12316 4252 bytes
SHA-256: 4dbe8df697f6d626a495a7e2cdccb4b85c8a56c6c340bbca1f6bb06a50d24588
font_03_sfnt_off00013205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13205 11452 bytes
SHA-256: f781cb503081dc46bc4ef692893f4049c4536c84568a9fb78e8bbf5c2fabdf0c

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