Malicious PDF — malware analysis report

Static analysis result for SHA-256 600ba6713842abbe…

MALICIOUS

PDF

69.9 KB Created: 2021-10-02 11:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 2cc8c7a9efac5e8cc4a87b6d131f6699 SHA-1: 4efb94836b229c8aa32b498c04e73bcd4f84a4a7 SHA-256: 600ba6713842abbe9630bbb5f4d2d753b169c8a90937bac8f2b86129f851b5f7
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of creating numerous links on distinct hosts, suggesting an attempt to manipulate search engine rankings or distribute malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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 http://lica.plovdivweek.com/js/ckfinder/userfiles/files/51781046694.pdf In PDF document text
    • https://trainova.com/userfiles/file/42574370948.pdfIn PDF document text
    • http://netcentricnj.com/ckfinder/userfiles/files/64598877016.pdfIn PDF document text
    • https://open-call.fr/uploaded/files/86282795686.pdfIn PDF document text
    • https://www.prowallpanama.com/wp-content/plugins/super-forms/uploads/php/files/4efb4db97b7e70d81299822fb1789344/34655175753.pdfIn PDF document text
    • http://cuspsurgeons.com/userfiles/file/25884222558.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/16147e7b57454c---38783906140.pdfIn PDF document text
    • http://bdpq.hungminhits.com/files/uploaded/files/sevimebobagepe.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/5hg2psfsj80pc6nqjlddg69taa/zemoluwodozolifirepejare.pdfIn PDF document text
    • http://masterref.ru/editorfiles/file/dusone.pdfIn PDF document text
    • http://aotem.com/data/home/qxu1780220113/htdocs/uploadfile/files/11446337268.pdfIn PDF document text
    • http://codienlanhminhquang.com/upload/files/kefirugotojetat.pdfIn PDF document text
    • http://zdrowejaja.com/Upload/file/vawapoxolutagodeze.pdfIn PDF document text
    • https://www.syah.org/wp-content/plugins/super-forms/uploads/php/files/6295d4e1b06f146b15a664e70fd86ed8/90703542415.pdfIn PDF document text
    • http://a2kat.ru/userfiles/file/10138321885.pdfIn PDF document text
    • http://fluorescent-training.com/file/77274660219.pdfIn PDF document text
    • http://www.alwaysflorida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614b769fc8b72---voretedizo.pdfIn PDF document text
    • https://habibitours.com/ckfinder/userfiles/files/fenopadejip.pdfIn PDF document text
    • https://j26clean.com/upload/files/63868549056.pdfIn PDF document text
    • https://copab.tn/216mag.svn/uploads/files/jivekewusokuxa.pdfIn PDF document text
    • https://hsdinstruments.nl/uploads/files/subezapem.pdfIn PDF document text
    • http://chromowane.com/userfiles/file/jejozumij.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/mowikepasanix.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/GLLx1DTH0VQ/uplcv?utm_term=450+usd+to+rmbPDF link annotation
    • 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_off0000aefc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAEFC 17068 bytes
SHA-256: 1989635b954729e13a65da881f8e9d4664637919d0bc83b1f72e8280b6ea8a18
font_01_sfnt_off0000dad6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f2ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2ED 10348 bytes
SHA-256: 389130abaf4e97e70facb26fbd18115bdf6391a250421fdfab08108be92d781b

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