Malicious PDF — malware analysis report

Static analysis result for SHA-256 a699e5ade1b45e26…

MALICIOUS

PDF

99.2 KB Created: 2021-09-02 02:44:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 339f9c65006d89c46e87d9c06312839b SHA-1: b54498a04cb70f366684d8f9278287085dbe235b SHA-256: a699e5ade1b45e2689d74874792f296a9501baa49c6e9fff91b98d3bf7a9d051
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, indicating it functions as a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. The embedded URLs are the primary indicators of compromise, directing users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c6e9d04fc1e---8163107283.pdf In PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/931e99a24d0e595dfb60621d926b98fd/sokamasidixewabavibuke.pdfIn PDF document text
    • http://be1971.com/clients/a/a1/a19be2fc4cf8b198b52f296748481ce5/File/56173833713.pdfIn PDF document text
    • http://bacsionline.net/userfiles/file/32531352734.pdfIn PDF document text
    • http://thrifty-uy.com/files/others/vujolos.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/kukemevasedeboxamijijid.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2ca4576e5---71828866131.pdfIn PDF document text
    • https://karolinanowak.com/userfiles/file/28454333073.pdfIn PDF document text
    • http://agiusfuneraldirectors.com/files/file/porikegaxi.pdfIn PDF document text
    • https://servicepapik.ro/files/53971010446.pdfIn PDF document text
    • http://promocode.lu/userfiles/files/33788204689.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/ba069f202bdc9ea2f2a17734b95aee89/kegazijifa.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a2aaed9d815---95009391027.pdfIn PDF document text
    • http://creativetechno.in/userfiles/file/jitogewajanobujuseno.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/9820056939.pdfIn PDF document text
    • https://imagebeaute.fr/userfiles/file/27135573358.pdfIn PDF document text
    • http://potlista.com/file/files/50499695952.pdfIn PDF document text
    • https://buka.ru/sadm_files/dixudamezalitumeb.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/97500312.pdfIn PDF document text
    • http://koryosushi.com/uploads/files/taxusijovanikaseguz.pdfIn PDF document text
    • http://binhchuachay.info/Images_upload/files/21793701542.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/51763176059.pdfIn PDF document text
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d5f025f5c---wawubimozowufoxoleboza.pdfIn PDF document text
    • https://sportsht.com/userfiles/file/25024814562.pdfIn PDF document text
    • http://wsm.hk/images/uploadfiles/file/35261141511.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=top+new+movies+to+streamPDF 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_off0001215f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1215F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00013976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13976 10480 bytes
SHA-256: 458956b0b46e82ff72faccb3a81be5cc70d05b7480bf3bb157058fd9b7500ec1
font_02_sfnt_off00015158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15158 17720 bytes
SHA-256: 0b515fa36202b646419ba03b2d7db42e94bb4f7d8782a75d714a374649d487a6

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