Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ee832d6845220bc…

MALICIOUS

PDF

85.3 KB Created: 2021-06-25 20:34:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: b5f190c3ba2f7b3171e92cb10af6330d SHA-1: 5ea653907f4e3971ef5dc5d22807c1e945c549b4 SHA-256: 6ee832d6845220bc4c32879431982b7f836784c8f7160bb9fb19e2a6e82b37f9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier further support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

Heuristics 6

  • 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.
  • 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://epoetryworld.com/clients/53741/File/39233823767.pdf In PDF document text
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/258f4ca246e17b50df20f8f39aa4645c/wumadibexutojoj.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/76fe902a8c2dc86d26f095b1f5d82333/57723573641.pdfIn PDF document text
    • https://mimpishio1bet.net/contents//files/majikareponirodero.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607999a7cf09d---64644100687.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/487abed82bca37904ebedcdad5645137/2264044579.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090803ba74bb---95151114807.pdfIn PDF document text
    • http://abogadosaguilar.com/ckfinder/userfiles/files/jikisusonojofoxud.pdfIn PDF document text
    • http://goteneplast.se/files/images/file/jepogel.pdfIn PDF document text
    • https://www.adelaarenergy.com/wp-content/plugins/super-forms/uploads/php/files/49q3bqvt563r4kkhnn0snncfjv/3456683711.pdfIn PDF document text
    • http://chinahongji.com/d/files/jivudatul.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1608eaa9a17edd---94222734691.pdfIn PDF document text
    • http://akinmedical.com/uploads/file/77887965468.pdfIn PDF document text
    • https://canvasations.com/wp-content/plugins/super-forms/uploads/php/files/bnu051jj9bo7ge2tgidg8ef6s2/dowutawukogamumixe.pdfIn PDF document text
    • http://kiuruvedenlukio.fi/tiedostot/file/15817361920.pdfIn PDF document text
    • http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087015ae5955---74530708486.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/u6ti575sipl4coeincpot3oui3/xopiz.pdfIn PDF document text
    • https://paklya.su/design/img/upload/file/vokalafokutuzibididurit.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/29770417556.pdfIn PDF document text
    • http://www.puhito.hu/uploads/memetakuzemudi.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609be4e78625f---2612180659.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/gowabukorulenetogomawupot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=types+of+clarifiers+in+wastewater+treatmentPDF 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_off0000e7ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7EE 17312 bytes
SHA-256: c3511ad9393c3340d505301927bd1dc33a469c8664c737446d71851ef13000d6
font_01_sfnt_off00011531.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11531 10804 bytes
SHA-256: 824d35f402ce6ee194dd11957a8489e242e519351ce1a850a55deb971f77625f
font_02_sfnt_off00012e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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