Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f5315a2d886b6ae…

MALICIOUS

PDF

94.7 KB Created: 2021-07-25 20:00:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 23ea9a7bdda899d227e641fc4e37a9c8 SHA-1: 2f1c20b9af81f75d6fbba2c7d496a0b03fef14e4 SHA-256: 0f5315a2d886b6ae8e92a8c37ece2d6caf6af3527276b374eb52e272496b2965
156 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 high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, suggesting a link farm designed for SEO manipulation or to redirect users to malicious sites. The presence of these links and the overall structure strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/ea44e53a6f03ee83d5615c823809e1ae/viserejikazajexaz.pdf In PDF document text
    • http://biotledlight.com/userfiles/file///dejiziba.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f4b3a69ef73---76204890510.pdfIn PDF document text
    • http://charontrade.hu/data/file/temiwefekevenidi.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/nelujunepotutozifonuboga.pdfIn PDF document text
    • http://soflocops.com/clients/67403/File/41718738407.pdfIn PDF document text
    • http://agro-vostok.ru/userfiles/file/toxegamu.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a203be606d9---11978689440.pdfIn PDF document text
    • http://anjilh.com/uploadfile/file///2021050109264047.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/lapiwixuminir.pdfIn PDF document text
    • https://www.traveltimevipp.com/wp-content/plugins/super-forms/uploads/php/files/0e313a8402f6cad569b399dca89fad9c/56043761824.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/30c5d6327b8bde3307221dbc54ca10b7/gifawaf.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/91743457395.pdfIn PDF document text
    • http://avtoarka.ru/wp-content/plugins/super-forms/uploads/php/files/8e79686d7f8ffede7b9e96b46b10ff1b/botaduv.pdfIn PDF document text
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da2c5c28095---wulate.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/49843d3293dfb346c4eb9355c0fd2694/13355029542.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/pemidam.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160c38f94eaebb---nosevalunoxori.pdfIn PDF document text
    • https://lllk.ru/wp-content/plugins/super-forms/uploads/php/files/47e27234da994691f1f4d7024ad7e70f/wizonifufewatawutuwo.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609be7c4708bd---zamatuxemetomafakipi.pdfIn PDF document text
    • http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a53b7628673---36358784120.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/9bq37p4e9d3tl8ed3h298a3lls/15516603621.pdfIn PDF document text
    • http://alphanaturehk.com/userfiles/file/57542503857.pdfIn PDF document text
    • http://open-call.fr/uploaded/files/fobikixobote.pdfIn PDF document text
    • http://jestbogiem.pl/app/webroot/uploads/file/38593829290.pdfIn PDF document text
    • https://www.avenueroadadvertising.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607919a04df9a---mulavisiralarodemu.pdfIn PDF document text
    • http://vom-ragnaroek.de/uploads/file/36726876177.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=how+force+dynamometer+worksPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000109df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000121f6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121F6 10780 bytes
SHA-256: d50d85e22dedb3a4bc9727ebed4e75f813f4fecd03e94a395d997a2670db7542
font_02_sfnt_off00013adf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13ADF 18292 bytes
SHA-256: 619db0fd843bec7ed9decf2d5158cd7ed690776a40a5366d31aadb557ce7cd13

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