Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7e86627970e6290…

MALICIOUS

PDF

84.1 KB Created: 2021-08-07 03:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d3c3ab745963a1d5e2cd2a071cd5d1da SHA-1: 155d7fea3c017da33f7edb79560967fe736a48ff SHA-256: e7e86627970e62908313c01a7849677417dbb4b685b40c66ac0f860f262cada6
216 Risk Score

Malware Insights

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

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm designed to distribute malicious content. The critical heuristic 'SE_SECRET_RECOVERY_LURE' indicates the document's content is designed to trick users into revealing sensitive information, such as recovery phrases or private keys. ClamAV also detected this file as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://beribuket.ru/wp-content/plugins/super-forms/uploads/php/files/55495997558a520053dfdd9c48b17073/norinurodoro.pdf In PDF document text
    • https://lakecountyoralsurgery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16102d99b60c9b---90965790033.pdfIn PDF document text
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/98t8dljl80r7inrn8n6qvd78c2/kadoduwoxokasevuzedajix.pdfIn PDF document text
    • https://aduanaldelvalle.com/userfiles/file/46360210073.pdfIn PDF document text
    • http://newtarrytowndeli.com/uploads/files/17995868376.pdfIn PDF document text
    • http://budoprojekt.eu/obrazy/file/fufunujega.pdfIn PDF document text
    • http://softtox.com/new/userfiles/file/repesixunijegofirajexu.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/fagaguxozefak.pdfIn PDF document text
    • https://beautyyaurient.com/editor_upload/file/tofufeza.pdfIn PDF document text
    • http://riggi.ru/userfiles/file/pudatixonigedonoponebotog.pdfIn PDF document text
    • http://honda-vo.com/upload/file/rafinijasimosinejone.pdfIn PDF document text
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/16092264a5de92---noxidukinerumo.pdfIn PDF document text
    • https://dianthusindustrial.com/resimler/files/pupobagifomasusoror.pdfIn PDF document text
    • http://casier-a-bouteilles.fr/file/posuwogilapawow.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d873286120---borixegewixakugo.pdfIn PDF document text
    • https://jagominum.com/contents//files/44882981775.pdfIn PDF document text
    • http://findingthegrey.com/userfiles/file/nutewafefosezorajod.pdfIn PDF document text
    • https://balajitutorial.com/admin/userfiles/file/gupifumivevo.pdfIn PDF document text
    • https://kleinimmobiliere.lu/userfiles/files/4083336184.pdfIn PDF document text
    • https://empylean.com/wp-content/plugins/super-forms/uploads/php/files/fa86rk3kfqqgt48e68dqk6pgma/37573592485.pdfIn PDF document text
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160c85bc480137---16413515619.pdfIn PDF document text
    • http://pamat.ro/UserFiles/file/17347079399.pdfIn PDF document text
    • https://amirep.com/wp-content/plugins/super-forms/uploads/php/files/18bc6db258d9cb4a164ae86782061bf5/medaxanepes.pdfIn PDF document text
    • https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a1bd2b275dc---wabuwuxu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/zMnd8XtcwSM/uplcv?utm_term=trading+in+the+zone+mark+douglas+portugues+pdf+downloadPDF 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_off0000dc2b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC2B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f43d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF43D 21264 bytes
SHA-256: 5bd2a36564e252837a5c0227a99698dd92c9e622fc633e3690fac1a033dd37be
font_02_sfnt_off000125a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125A5 11248 bytes
SHA-256: 20a048801c3db7a16c0f51a9b55e153a7f1186fdceb6447744f8d387ab3839d9

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