Malicious PDF — malware analysis report

Static analysis result for SHA-256 d12ac5fb1006bc4b…

MALICIOUS

PDF

74.5 KB Created: 2021-06-24 14:08:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8f9db3dac1b497dc64d7b926fe13cdf3 SHA-1: a63a86b3915f21b2c7747fedbcc943071766edcd SHA-256: d12ac5fb1006bc4bb6bbc6295279c62223a1518c8d60faf268a44cb3e04027a3
156 Risk Score

Malware Insights

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

The PDF file contains numerous links, many hosted on compromised WordPress sites, designed to redirect users to external sites. The document body, though partially corrupted, suggests a lure related to printing photos, which is a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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 http://www.peplex.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b343510a4fa---50301138255.pdf In PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/sdk36fhn9q8bf5496897a12j6k/4665222071.pdfIn PDF document text
    • http://trimblehighalumni.com/clients/84492/File/39766901660.pdfIn PDF document text
    • http://learningkey.org/userfiles/92802763500.pdfIn PDF document text
    • https://xn--80aaaglcftt5alesfkk7f.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/b9ef480668b8bfad41db4a8eff360e42/depokirutanisate.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f1c77f0020---73144228303.pdfIn PDF document text
    • http://www.ddd-iasi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1607b2cd6c4f9f---tudozozutedorotugejuvine.pdfIn PDF document text
    • https://choiceenergynetwork.com/wp-content/plugins/super-forms/uploads/php/files/32a4d24c84e792d03765c3ae2eae1fc4/92630829234.pdfIn PDF document text
    • http://asustainable.com/global/file/sowusapamojizukifur.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607367691f530---voxajimaxuna.pdfIn PDF document text
    • http://learnersdigest.org/userfiles/file/26636196380.pdfIn PDF document text
    • https://vegan-eshop.cz/data/file/naloxubukibutape.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/8ac53be5f60ebfd5a562a9a7b0d7012f/lusajunip.pdfIn PDF document text
    • https://drmiamiconnect.com/wp-content/plugins/super-forms/uploads/php/files/8deb2511e8f1faf7bc76f9e8c0095fae/22958962479.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/c3d33064707434431a1ce1722cd4084a/kepaw.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bc16f6830a5---42227768265.pdfIn PDF document text
    • https://bf-pomosch.ru/wp-content/plugins/super-forms/uploads/php/files/hp2k23bcadsrcq322gd4koct56/tabefasiligenexu.pdfIn PDF document text
    • http://abwingscolley.com/uploads/files/35013116741.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+print+photo+from+ipad+to+printerPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/2479a2fb15708a164b3d50d1ff37bae1/98986996500.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE426 5124 bytes
SHA-256: 0c3adf31997fe256f88f4b6b2647a3d48d948ba7d0a1bfd31888ceaad5bb056a
font_01_sfnt_off0000f579.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF579 10932 bytes
SHA-256: 2467c782f74b16e98966691b9ca7c92dbeeeefde577e8744f738491fd65dfafc

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