Malicious PDF — malware analysis report

Static analysis result for SHA-256 7548086d2914c9f1…

MALICIOUS

PDF

86.7 KB Created: 2021-06-28 17:22:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 4337c00cb5d20ec1a233fe54c144fb7b SHA-1: 241f88eb065c262397dca0a19b699fbfff597a1e SHA-256: 7548086d2914c9f1eb355621945db92ae63fce6d28b1d4678c6de8e8fb9d0e41
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. It contains numerous links to external websites, many hosted on compromised WordPress sites, suggesting a phishing or malware distribution campaign. The presence of PRC/3D content and duplicate object bodies are common obfuscation techniques in malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 7

  • PRC/3D content in PDF medium CVE related PDF_PRC_3D
    PDF contains PRC 3D content. PRC/U3D parsers have been a recurring Adobe Reader attack surface; treat as a related parser-exploit indicator rather than a specific CVE match.
  • 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://pistant.ru/uplcv?utm_term=viewfinder+that+uses+a+pentaprism+is+called PDF link annotation
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8b1c1e1b2---votiruzepogitasuxo.pdfIn PDF document text
    • https://koffiewarenhuis.nl/app/webroot/files/userfiles/files/tajabumuronamovisujupopu.pdfIn PDF document text
    • http://easyreturn.store/userfiles/file/taxatuzapapobolezo.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a613fda574---kedanasoxuzomuta.pdfIn PDF document text
    • http://raunlarose.us/wp-content/plugins/formcraft/file-upload/server/content/files/1607b7edf2a7e6---lozerofovotito.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ho5qrbl2b2d3stln5ca6bo0cq2/wudoxuxudaxemirotijiw.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/7e4ab9870677af37e87438da3340752b/jenajurisonijizagexizeg.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4b41950f8b---waxeteboluwit.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609843681730d---simokadomarodulutixubik.pdfIn PDF document text
    • https://faltprasten12.se/anvandarbilder/70/files/simivejemabivevo.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/1ba3e3f27bd6eaecaff888490a3fa8a6/10843914337.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/16078a7b9b185b---takosatuwatilutawip.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ql057tbmkuf3tpe8tjujb3qfsq/18406061484.pdfIn PDF document text
    • http://gapoom.com/upload/fckeditor/file/lurot.pdfIn PDF document text
    • http://cmtsport.com/pliki/vevudutiruwakipir.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/dewugimexesorifevi.pdfIn PDF document text
    • https://xistenze.com/files/files/tefofugavolusikelategatep.pdfIn PDF document text
    • http://www.advokat.com/app/webroot/img/fck/file/41538320864.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ng8jneika12p8k4goko0vn6pun/20836991000.pdfIn PDF document text
    • http://lushexperiences.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3c15b415c0---wegijavomi.pdfIn PDF document text
    • http://bsp-oblspl.org/ckfinder/userfiles/files/pinejagutuwedi.pdfIn PDF document text
    • http://www.rec39.ru/wp-content/plugins/super-forms/uploads/php/files/a2f8f452013e08d7169fe99d539a6e29/62235479218.pdfIn PDF document text
    • http://musthighschool.mn/ckfinder/userfiles/files/figilosopujoju.pdfIn PDF document text
    • https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca10fa64f0---4384261485.pdfIn PDF document text
    • http://andreagarciam.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cde97eab0d---77263518961.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_off0000f044.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF044 10920 bytes
SHA-256: cc0d440ccd51ea61637554986f312acd556e2dca16efbf269dbf77388d8dc2a6
font_01_sfnt_off00010966.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10966 16840 bytes
SHA-256: 50b04ba48fd31922b02b0fc5a684e8f9be22543d36727e356c418531392a5d9d
font_02_sfnt_off00013571.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13571 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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