Malicious PDF — malware analysis report

Static analysis result for SHA-256 030b93159aca83af…

MALICIOUS

PDF

144.2 KB Created: 2021-07-08 21:33:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: ee9f8d295f947df75ed77393b6084f34 SHA-1: e6bc1cd15bff3c59dcc374a736af1e63708c63c9 SHA-256: 030b93159aca83aff650c33d71fe1a2927319927aef07c0af111f7e826275cf8
156 Risk Score

Malware Insights

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

The sample was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics reveal it functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads, consistent with a malicious PDF dropper.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://oniceh.ru/uplcv?utm_term=advanced+mathematical+concepts+precalculus+with+applications+pdf PDF link annotation
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/2426a6165f489d2795e5fe9fede651ad/24022372822.pdfIn PDF document text
    • http://www.yourhealthyourchoice.org/wp-content/plugins/formcraft/file-upload/server/content/files/160aa12c65f7df---nawetuk.pdfIn PDF document text
    • https://aeternoplanning.com/ckfinder/userfiles/files/sasuvekepugojelab.pdfIn PDF document text
    • https://heatingboiler.ca/fck_upload/file/7571064169.pdfIn PDF document text
    • http://mp-hd.de/data/aktualnosci_imgs/file/7855090502.pdfIn PDF document text
    • http://diagonal.org.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1609c18df0dbc2---97910885407.pdfIn PDF document text
    • https://loctra.net/userfiles/file/xudegisavudofod.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/1o5uvo62maan8iiel7dbrcudkd/jegemanalubaneriv.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160c9d3790d6fe---60538946910.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/zevomowupus.pdfIn PDF document text
    • https://sellos-mecanicos.com/wp-content/plugins/super-forms/uploads/php/files/f3dd256c604d8fb82e68d692b9704231/fipofelipazijopawaziti.pdfIn PDF document text
    • http://automsystem.com/UploadFile/file/20210608045941472.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/sg4v0emvv0euu0mo13fich0q84/56467336819.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160700dead2f95---36716007836.pdfIn PDF document text
    • http://theopenhouseclub.com/wp-content/plugins/super-forms/uploads/php/files/0a9f28b518be015d3cfd612bbb31d540/44914474954.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/mobunifikabumuk.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/gitalosinibuluzituw.pdfIn PDF document text
    • http://partner-support.net/user_data/userfiles/files/69855550133.pdfIn PDF document text
    • https://cornerstonelaw.eu/userfiles//file/varawisunefotufox.pdfIn PDF document text
    • http://sierrahighalumni.com/clients/878712/File/54821091417.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160ca07777d03d---17612879541.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/8a19dc27662bab03f1cdf5da45fceca2/vodajoralikomek.pdfIn PDF document text
    • http://cyklo-sport-servis.cz/UserFiles/File/68613979900.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_off0001cde7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CDE7 19096 bytes
SHA-256: c23eac1a21afc792a224cc42dfcda5b355dc52628498f8ce1439b5469122542c
font_01_sfnt_off000200fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x200FD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00021914.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21914 11116 bytes
SHA-256: 34b0ae0eb9ade9d8d5ab36f61c44aa48ea1f3f9298570354f07ccc7423e35c89

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