Malicious PDF — malware analysis report

Static analysis result for SHA-256 aedb8b32cb918229…

MALICIOUS

PDF

77.7 KB Created: 2021-08-17 13:11:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7f803f3320d0f9c2acfe81d9cf5d8c3a SHA-1: b2fd1c460bb3407387bec832000381fa88928653 SHA-256: aedb8b32cb9182294646a03d7b10485ff8028768bcc7533a133fd357b75267f2
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is identified as malicious by ML classifiers and ClamAV, and exhibits characteristics of a credential harvesting lure. It contains numerous links to external sites, many of which are hosted on disposable domains or compromised CMS uploads, suggesting a phishing infrastructure. The document's primary function appears to be tricking users into providing sensitive information like one-time codes or MFA confirmations, consistent with phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • MFA / one-time-code harvesting lure high SE_MFA_LURE
    Document asks for a one-time code, authenticator approval, or MFA confirmation — consistent with credential phishing kits that steal session tokens or abuse multi-factor authentication
  • 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=fox+sports+go+activate+not+working PDF link annotation
    • http://bobiniauto.com/userfiles/file/bexobewizulud.pdfIn PDF document text
    • http://ganan10.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/160a712b88b8d0---21639316535.pdfIn PDF document text
    • http://baihsad.com/userfiles/files/20210720_233251.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/a4899f49ce60095d946c02b34768bb87/41194751519.pdfIn PDF document text
    • http://szwygs.com/upload/puwitegokalotat.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/89471671057.pdfIn PDF document text
    • https://jgmurphy.com/wp-content/plugins/super-forms/uploads/php/files/ab369b0c5248ff35535c243123260966/nafavetanuvawalasired.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1610dcf2eb2198---lafiwugobose.pdfIn PDF document text
    • http://innospectrum.eu/hirlevel/file/58755338789.pdfIn PDF document text
    • http://sluchatka-shop.cz/files/upload/files/bolakagu.pdfIn PDF document text
    • http://minerva-collection.net/files/files/73197982856.pdfIn PDF document text
    • http://www.stemcellhairclinic.com/files/files/31379906144.pdfIn PDF document text
    • http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16077ab107da9c---lepelafufexupuzafapuselu.pdfIn PDF document text
    • http://dkyangmei.com/uploadfile/file/2021062922034973499.pdfIn PDF document text
    • http://nhakhoasaigonkimcuong.com/uploads/images/files/fibel.pdfIn PDF document text
    • https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ntq0sro6g2uqf5qntnlgo808nm/morexo.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/6f89c7e52101dc7d8c7d77412bb6a7ce/sigedovimezemigofosu.pdfIn PDF document text
    • http://synergyproperty.com/images/files/xuwezunerodazokodegaxaz.pdfIn PDF document text
    • http://arci-mp.fr/admin/File/28370126245.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/16088bdcbc754d---85253502038.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_off0000cce6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCE6 16648 bytes
SHA-256: 332280a69b5414586e7ade915a40f1594161f29ea93569df0149320c3058afd6
font_01_sfnt_off0000f85d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF85D 10828 bytes
SHA-256: c5ce39a19f1ccb7d9d552fe80df212883d211786d398c4898fa0775748988892
font_02_sfnt_off000111a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111A0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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