Malicious PDF — malware analysis report

Static analysis result for SHA-256 60ec330d6c43a083…

MALICIOUS

PDF

85.6 KB Created: 2021-08-05 05:50:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e77f2e5654a333f8d35c0f0c5936c8fb SHA-1: bae8eb17324ac768d46da86b1e75542dace9d26a SHA-256: 60ec330d6c43a0831db0c8d7d731b93802d6b2c90f352a5ab55ae22df4863b83
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a link farm pointing to numerous compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. While no scripts were extracted, the structure and URL patterns are consistent with a malicious PDF designed to lure users to external, potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://eviinstall.com/userfiles/files/xenulud.pdf In PDF document text
    • https://spherule.org/wp-content/plugins/super-forms/uploads/php/files/f4ccf3e7e4152baaed3bd6e889ac7f3a/3822794745.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/96848s1ilsk9ink2lhsb552ajh/janisitinafaxukopobukusex.pdfIn PDF document text
    • http://slowjamsundays.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fa8f189ee3a---79147730221.pdfIn PDF document text
    • https://rdw-wolf.de/backend/ckfinder/userfiles/files/33086467739.pdfIn PDF document text
    • https://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2685ccfd85---juzerutalebeforaje.pdfIn PDF document text
    • http://curry-box-deluxe.de/userfiles/file/fuwalajazugakuvow.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608c1f8f853ee---59988323298.pdfIn PDF document text
    • http://fanti-fitness.pl/uploads/assets/file/tefos.pdfIn PDF document text
    • https://internationalmedia.com/userfiles/file/56769280118.pdfIn PDF document text
    • https://vieclamxaydung24h.com/upload/files/57271894264.pdfIn PDF document text
    • http://kiiga.ru/userfiles/file/75480043758.pdfIn PDF document text
    • http://www.colegiometa.net/home/wp-content/plugins/formcraft/file-upload/server/content/files/1609da0965f6ad---dasagalujosadaz.pdfIn PDF document text
    • http://intproplaw.com/admin/uploads/file/lapesipavadavudorebapawem.pdfIn PDF document text
    • https://f27szerviz.hu/upload/files/zazidul.pdfIn PDF document text
    • http://sotel-perm.ru/site/file/kemexuzun.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/0faf82c11be6df30463f18ee13ec18da/guzugefeduvitij.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160727a9b23848---jafofumevisol.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/bcd91e52ed6f008b75bff9157fce5750/85583649392.pdfIn PDF document text
    • http://chicagohalo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d7cbb4e02---musupopipetenijemapikosu.pdfIn PDF document text
    • https://newtop-eg.com/userfiles/file/44996300324.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/22814918274.pdfIn PDF document text
    • https://svetpoznaniyaonline.ru/wp-content/plugins/super-forms/uploads/php/files/da7309bffeeed44b5eb3f109542c2307/98417713762.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=honeywell+wt8840b1000+water+heater+gas+control+valve+manualPDF 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_off0000ea1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1C 16400 bytes
SHA-256: 59e23e1f2fa9dd94359d2130c5425918855f69e0b75a2e37344665b2e4b5471e
font_01_sfnt_off000114cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114CB 11544 bytes
SHA-256: 166e69c84a4b8dd98089ce0cdf839966536c14379f80b31e2aab0dddb5e3d441
font_02_sfnt_off0001302c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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