Malicious PDF — malware analysis report

Static analysis result for SHA-256 0fad09feb8722424…

MALICIOUS

PDF

84.3 KB Created: 2021-09-02 07:47:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 7d64d6c3b67807737ef1526da1801160 SHA-1: 0d648ab9dba0db4e26ffd82d7614b2681676de02 SHA-256: 0fad09feb8722424861d04f2b2e533dff4099e30484344f850bd62d0d6c27b0f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, with heuristics indicating it's a PDF link farm pointing to compromised WordPress uploads. The embedded URLs, such as 'https://archism.ru/uplcv?utm_term=intraday+trading+strategies+india+pdf', are likely used to lure victims into downloading further malicious content. No scripts were extracted, but the overall structure suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://archism.ru/uplcv?utm_term=intraday+trading+strategies+india+pdf PDF link annotation
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160983e1778c89---ladatabojobowedomemomuvog.pdfIn PDF document text
    • https://fotofidelity.cz/userfiles/file/41480563037.pdfIn PDF document text
    • http://kripasec.com/userfiles/file/36107964521.pdfIn PDF document text
    • http://sanmorales.es/userfiles/files/13855833017.pdfIn PDF document text
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a149c23c376---vowusil.pdfIn PDF document text
    • http://huthamcauquanggiap.com/upload/files/xukolu.pdfIn PDF document text
    • http://dbcasagayathottam.org/assets/uploads/cms_images/files/pujegawuwanedozobebisomip.pdfIn PDF document text
    • http://garantc.ru/userfiles/file/41322100021.pdfIn PDF document text
    • http://uniquecharacters.com/upload/files/79951377943.pdfIn PDF document text
    • https://www.dishdivvy.com/wp-content/plugins/super-forms/uploads/php/files/efa7ccd092855263f879a094afa80735/valemobakimo.pdfIn PDF document text
    • http://modero.vn/upload/files/lukusanopopoxudunamubaz.pdfIn PDF document text
    • http://ksboutlet.com/file/files/35229099388.pdfIn PDF document text
    • http://elazentrale.de/images/uploaded/file/42500166537.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/kuguxewagisar.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610135ed38b95---18435144307.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/9lgar477ji01deu3484ml1eg7q/21191450325.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/bekeruguvolewol.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/49349478218.pdfIn PDF document text
    • http://theemasternetworker.com/ckfinder/userfiles/files/pejaxogetojop.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160862487af605---dasagupigerilotolazupezo.pdfIn PDF document text
    • http://furkansigorta.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160d030817e7b6---kunozozorixako.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/23606cbc1bd415a870806f1722eed1a9/22245704859.pdfIn PDF document text
    • http://brandnewgoods.net/userfiles/file/fotugede.pdfIn PDF document text
    • http://sbkf.org/files/files/xiwotededaduj.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_off0000e564.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE564 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fd76.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD76 17780 bytes
SHA-256: 57eb900fc8e258297c069c2d15203d691f9b4869b14d8ce87882d69fab601634
font_02_sfnt_off00012b67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12B67 10572 bytes
SHA-256: d939ae464a8a6558ca8b01b8cded8f85886b7b6a20b26a508e0e2161edf5958c

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