Malicious PDF — malware analysis report

Static analysis result for SHA-256 32da0a87fd02526c…

MALICIOUS

PDF

81.8 KB Created: 2021-08-28 15:09:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 2c1afb1fabd630745e6ce04cd1cfbe7d SHA-1: e5715c3ae7cb3a14c639bb324e23a1e95f6e22d7 SHA-256: 32da0a87fd02526c9f0df08671f9e3d8f0da3eca7d84115e53485b2c0066b5ce
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised CMS upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The file's structure as a link farm suggests an attempt to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://inwebjor.ru/uplcv?utm_term=dnd+5e+two+weapon+fighting+build PDF link annotation
    • http://accurateverdicts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160807887d1830---bezugekasogenika.pdfIn PDF document text
    • http://uralcomservis.ru/crn_fls/crn_files/43353810576.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607b0e33c15db---xonedopoxojepupomo.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/suvigaxubujizeniruw.pdfIn PDF document text
    • https://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/5afc8557d26d60fe687fdfa6b303da64/30946794174.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/88367257772.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a786e1195bf---dulilenosojumafiliko.pdfIn PDF document text
    • http://zetrade.cz/userfiles/file/95457406643.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/livozubilusulenunuzaliwo.pdfIn PDF document text
    • https://emprenderem.cl/files/1640877681.pdfIn PDF document text
    • http://kernenshepler.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/notixoluduxonupukasukivag.pdfIn PDF document text
    • http://www.bewegeninarnhem.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160c2f4a37531a---60128905633.pdfIn PDF document text
    • https://songod.vn/uploads/image/files/kitidasitebumodawu.pdfIn PDF document text
    • http://e-pisanie-prac.pl/famprojekt_z_serwera/images/file/94672399773.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/86513a1bf6c6f86532712847f033a20b/juwurubusavo.pdfIn PDF document text
    • http://lbhodgereunion.com/clients/3/38/38e1f81cb1ac74d12d86c8ba87866b9f/File/gajobumuzafev.pdfIn PDF document text
    • https://aadhaarretail.com/administrator/imagetemp/file/90020433200.pdfIn PDF document text
    • https://aokman-drive.com/d/files/gujeguninasufuxomu.pdfIn PDF document text
    • http://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a1dcd0a0c4---69869176351.pdfIn PDF document text
    • http://anadolumatbaa42.com/genelresimler/file/tevuwigis.pdfIn PDF document text
    • https://irantruck.ir/data/file/sorenomug.pdfIn PDF document text
    • https://masterjobintl.com/ckfinder/userfiles/files/xofazegudevutavusinujojis.pdfIn PDF document text
    • http://bhartiyambeohari.in/userfiles/file/39431148122.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_off0000daeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAEB 10968 bytes
SHA-256: 8a952a66380d830406c70518d51b380042adb3ca945e3c3aeda0978846cbf3ee
font_01_sfnt_off0000f3f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F8 17248 bytes
SHA-256: c2e75ec63fd030938adf0c24dc490aa9763db3aa0efee7fe05a9435487dbca62
font_02_sfnt_off000120c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120C1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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