Malicious PDF — malware analysis report

Static analysis result for SHA-256 2db7469673c50606…

MALICIOUS

PDF

119.1 KB Created: 2021-08-13 02:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: da4cac0930cff6c54db9810b87035b0d SHA-1: 6cb28cd58403e15c35baf2a4793d40bb672929b5 SHA-256: 2db7469673c506063f6a7c6997595028ad2eea29604015eb0b1abe23754d4987
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, suggesting it functions as a link farm. The embedded JavaScript likely facilitates the redirection to these malicious sites, potentially for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pistant.ru/uplcv?utm_term=what+is+the+cause+of+megaloblastic+anemia PDF link annotation
    • https://anjingliar2.com/contents//files/7845067261.pdfIn PDF document text
    • https://thetitangroup.ca/wp-content/plugins/super-forms/uploads/php/files/8d90ea0a242d7ee91cbf5de7e47f83df/jalokukunibexoginenuxir.pdfIn PDF document text
    • http://nakatka.com/files/file/59396320947.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bd46d08049a---67578234527.pdfIn PDF document text
    • https://bio86.net/fichiers/jevuzuvamawaxorixofiw.pdfIn PDF document text
    • https://ngusacdon.com/upload/files/80899216572.pdfIn PDF document text
    • http://rainesclassof1980.com/clients/3/31/314d3ac3c31ee16cfc8f78d457af0ebc/File/42883932159.pdfIn PDF document text
    • http://euhoca.com/js/ckfinder/userfiles/files/28704672784.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/d09eb62d3e18c1b5432b1a9e5d673895/80027692126.pdfIn PDF document text
    • http://lhsclassof1971.com/clients/74120/File/jazewowarajesokoluxokopuz.pdfIn PDF document text
    • https://cosmopolitanhotelbg.com/uploads/wysiwyg/files/lolujul.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/48826331415.pdfIn PDF document text
    • http://meadescafe.com/userfiles/file/datoligusoworabuwop.pdfIn PDF document text
    • http://7onseventh.org/clients/868256/File/92751597023.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/66274268294.pdfIn PDF document text
    • http://tingyi-bnb.com/CKEdit/upload/files/89280106286.pdfIn PDF document text
    • http://samuiluxurytravel.com/Uploads/file/siwujenumukopomogaxumam.pdfIn PDF document text
    • https://www.hotel-palladium.gr/wp-content/plugins/super-forms/uploads/php/files/sfk6le7l7ncnvkibp3ru220oee/41463570901.pdfIn PDF document text
    • https://e-lightingcontrols.com/wp-content/plugins/super-forms/uploads/php/files/c373fdb76b97ab385a443e0753a2f55e/siteb.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1606fa8492ac42---99447360838.pdfIn PDF document text
    • http://stacjaregeneracja.pl/userfiles/file/80705379777.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160855ff872694---68963807847.pdfIn PDF document text
    • https://www.beewellrx.com/wp-content/plugins/super-forms/uploads/php/files/tmp/26440955618.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00016e9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16E9E 17912 bytes
SHA-256: 23bfe8989dfaf4a90d2042d220860f48865b9776297fe9fdcc8a108c28e9d016
font_01_sfnt_off00019d5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19D5D 10916 bytes
SHA-256: 68b09d1e7fde3329714cb0cf94002495ed9515fd1deb06d8f2a257adac5f367d
font_02_sfnt_off0001b67e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B67E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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