Malicious PDF — malware analysis report

Static analysis result for SHA-256 c1fec0a529ebc2cc…

MALICIOUS

PDF

85.9 KB Created: 2021-07-04 21:06:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 6a6242865c6fc86863c0512e2e9e71c0 SHA-1: 0f20ce99d328703988f9ec663b4bc832bbae7499 SHA-256: c1fec0a529ebc2cc8c3fd44f3c1871c269d600db2a91a29dad1dd3072460be94
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links, many pointing to compromised websites or disposable hosting, suggesting it functions as a link farm. These links are likely intended to redirect users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://mlight.cz/archiv/file/51790679971.pdf In PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/f77a5b6df2708a8dea0ade519315860e/fagutowogi.pdfIn PDF document text
    • https://extremetour74.ru/wp-content/plugins/super-forms/uploads/php/files/0f74afddda4138919385fcd148f8a790/77152924675.pdfIn PDF document text
    • http://analogsys.com/uploaded/file/6457350260cf820cc0e1b.pdfIn PDF document text
    • http://karinameal.com/imgdish/files/25281664462.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/wofetu.pdfIn PDF document text
    • http://akifkasaboglu.com/esatfisek/images_upload/files/niliruza.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609eb9b3bb7f4---16578325333.pdfIn PDF document text
    • https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a645388601a---bitivamusavugadigemelup.pdfIn PDF document text
    • https://makemycake.gr/wp-content/plugins/super-forms/uploads/php/files/4gmb9hi5q35cf2fngso4q3lldb/faboxerapetegoxub.pdfIn PDF document text
    • http://wojno-stal.pl/pliki/file/kulivuviroresozafozujikif.pdfIn PDF document text
    • https://narimasu-chintai.net/jcfiles/file/xesuvoki.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/2vkavhuhn2d3k8ugh6p9dskqvv/mazukowelewifu.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/8igrn7mc4a2s0tpurv18gfdk1f/92734318046.pdfIn PDF document text
    • http://becro-plast.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160834b092f10a---85873379474.pdfIn PDF document text
    • http://lightningriskassessment.com/ci/userfiles/files/vilivakalepage.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/vaxaritoxedetuxarawok.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/160915392877c9---69101312462.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607b8132333d1---6339168387.pdfIn PDF document text
    • http://ampletrekking.com/userfiles/file/kanunivewagedalokugopov.pdfIn PDF document text
    • https://rosemonttherapy.health/wp-content/plugins/super-forms/uploads/php/files/4a4occ394lvrbgp94ve285n4tu/geboxofemabala.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1606c815eeb93e---17469097232.pdfIn PDF document text
    • https://zweiund40.com/wp-content/plugins/super-forms/uploads/php/files/fqgd87r0erghergokcqdsqgn9j/61814261894.pdfIn PDF document text
    • http://www.asslar.de/downloads/vazugiwagogot.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=best+ophthalmologist+in+the+worldPDF 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_off0000eb58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001036a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036A 17676 bytes
SHA-256: b0e6dd0b93728c55e6f6eb14715d5dfc259c5f7cdb2d87fddccecc13be830140
font_02_sfnt_off00013125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13125 10980 bytes
SHA-256: 97661d5fabb5f255db2649b521eacbd435e3b9c56847d0d61809baeb6bb42925

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