Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d67fd7820611571…

MALICIOUS

PDF

87.3 KB Created: 2021-07-22 15:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 5148549ab87623902fc70a8323173a0f SHA-1: b878fc325393a301aed3b2348cf172ba78acb18e SHA-256: 0d67fd7820611571d38c6580930e90a43f55e4d560bbd47e6b09be77428f89d8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites, indicating a link farm designed to lure users to potentially malicious content. ClamAV and ML classifiers strongly indicate maliciousness, classifying it as a phishing trojan. The file's structure and numerous external links suggest it's part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.saraviation.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6f4dc33db3---goramezalosikilelodedu.pdf In PDF document text
    • https://www.superioreagle.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ee8be2df70b---92435630344.pdfIn PDF document text
    • http://pn-tech.net/userData/board/file/dutugotuxasavavi.pdfIn PDF document text
    • http://sosnovgeo.ru/userfiles/file/20236178049.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdfb81abcf---40130032919.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8867b503---temibuwabuna.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/9fd824728b1e8ebefc6d0812fdb7932e/puvirufakalerozesatar.pdfIn PDF document text
    • http://thedewakohchang.com/image/upload/File/adoxifobeze.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083a0cd7ed80---mefonubupemesetawef.pdfIn PDF document text
    • http://3sdent.com/upload/files/21274847998.pdfIn PDF document text
    • https://maloneslandscape.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcc6bd741f4---36180256157.pdfIn PDF document text
    • http://bukharageorgia.com/sites/default/files/file/ranabegovanuzuzexizom.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/wavado.pdfIn PDF document text
    • https://egyiksem.hu/uploads/file/80244961709.pdfIn PDF document text
    • https://cspdental.com/wp-content/plugins/super-forms/uploads/php/files/6a62e65ccf568d8a3764a3fa959f7e29/88220266912.pdfIn PDF document text
    • http://sage-chem.com/image/files/20210715_190943.pdfIn PDF document text
    • http://cellesekorea.com/ckupload/files/42171636496.pdfIn PDF document text
    • http://www.skupp.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4e9c68c22---24794068968.pdfIn PDF document text
    • https://next-engineering.com/userfiles/files/7286838471.pdfIn PDF document text
    • https://b2b-intelligence.it/uploads/file/jalinov.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/f08b9d0711db4873389114e0be015683/jikufebimatekamijazivin.pdfIn PDF document text
    • http://bmcnx.com/userfiles/file/loretan.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=uml+for+business+analysts+pdfPDF 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_off0000ef71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010783.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10783 17392 bytes
SHA-256: 89ebb1f492496e6fc14d3000c28dce8733f568b4c7f3f5fbad790c6f1e50ca39
font_02_sfnt_off0001345a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1345A 11020 bytes
SHA-256: b34d4ce8acbd1a1b5a9ee772bd2779c1ca17a6b8a69e7ee37c6228ea1c235cab

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