Malicious PDF — malware analysis report

Static analysis result for SHA-256 60a95febd8589ebe…

MALICIOUS

PDF

94.6 KB Created: 2021-09-06 10:04:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 8de5f9051891485d11f010051183b77b SHA-1: 68d42eae988214cd93be08f06c3832bb6e300b61 SHA-256: 60a95febd8589ebe6d469b70660409bd5d7a657eee9e5899424368b1e0e2d4f6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains numerous embedded URLs, many pointing to compromised WordPress sites, which are likely used to host malicious content or redirect users to phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed as a link farm to improve search engine rankings for malicious sites, further supporting a phishing or malware distribution attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://ketchas.ru/uplcv?utm_term=material+culture+of+harappan+civilization+pdf PDF link annotation
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1d52c354bd---tizigimuwazokosur.pdfIn PDF document text
    • http://soepcentrale-dekeyser.be/userfiles/file/50398348095.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160715f656b552---kilevuwokobogirubevi.pdfIn PDF document text
    • https://www.larche-de-jules.fr/ckfinder/userfiles/files/61130127029.pdfIn PDF document text
    • https://alakharia.com/public_html/userfiles/file/xusasasulofawimurunak.pdfIn PDF document text
    • http://ilovegabal.net/fckeditor/_upload/file/wemukeze.pdfIn PDF document text
    • http://klubbelgickychobrov.sk/editor_uploads/files/15141326924.pdfIn PDF document text
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160dbd1c98abac---puperila.pdfIn PDF document text
    • http://csa.china-led.net/static/editor/ckeditor/ckfinder/upfile/files/suziveva.pdfIn PDF document text
    • https://bostoncake888.com/UserFiles/files/67279965747.pdfIn PDF document text
    • http://ourconn.com/userfiles/file/202108262357314020.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/62104492093.pdfIn PDF document text
    • http://hunting.kg/userfiles/file/kuvowal.pdfIn PDF document text
    • http://stewartreunion2020.com/clients/2/2a/2a0d9dcdd57715375c9f4393c24df0f2/File/soluxinufikasaxezusi.pdfIn PDF document text
    • http://au-coeur-du-temps.com/userfiles/file/34962279118.pdfIn PDF document text
    • http://thevelascofamily.com/clients/11614/File/nukozaximemuxodizivov.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/28329821423.pdfIn PDF document text
    • http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/160942796158e9---97715864728.pdfIn PDF document text
    • http://93564497.com/userfiles/17064426227.pdfIn PDF document text
    • https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/e9e18f58688560f37aa47594138702c4/rawev.pdfIn PDF document text
    • http://www.sempresaude.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609f22e158af0---notokavamanubupizijudagat.pdfIn PDF document text
    • https://delaneyllc.com/ckfinder/userfiles/files/vulibolitovofuwa.pdfIn PDF document text
    • https://www.huaikrachaohospital.go.th/assets/global/lib/ckfinder/userfiles/files/gitevured.pdfIn PDF document text
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/ieoh34dglkk5b99r8sv3eq1h4k/zozakozokatoluvutijus.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_off00010f37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F37 17288 bytes
SHA-256: d94635c5f9f859ab123c37a7971be14b383ec4669a16673aa1462a9c2753488a
font_01_sfnt_off00013b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001537c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1537C 10768 bytes
SHA-256: d6ceb41f3f19be17f3d4abf9281bc12ac17a489dbfb8c196e1e89552280eac15

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