Malicious PDF — malware analysis report

Static analysis result for SHA-256 f40b0f75e4799d63…

MALICIOUS

PDF

85.6 KB Created: 2021-09-18 08:02:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 43adff46a9ded7561c3445fa3d0ae202 SHA-1: 01a0f11140fdad2322d717c7e24a1662df37a23a SHA-256: f40b0f75e4799d633549b8ad2a2f0c0864613226850e001c0c3c604a76c39b6c
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a ML classifier and ClamAV, indicating it is likely a phishing or malware distribution lure. The document functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites. These links likely lead to further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bc3d94d62b---36685079866.pdf In PDF document text
    • http://perfekt-dom.pl/designhome/admin/userfiles/file/xalewodexukabenapelixap.pdfIn PDF document text
    • http://tevukasveza.lt/ckfinder/userfiles/files/dewenisug.pdfIn PDF document text
    • https://mbbs.hr/files/juxapapajivitumuxadenadu.pdfIn PDF document text
    • http://tamtamphat.com/upload/files/2326200888.pdfIn PDF document text
    • https://www.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/4663e58389bed2225b730b55b8d527d1/21292106999.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/jufalekikezikomejomaxe.pdfIn PDF document text
    • https://maydongy.com/wp-content/plugins/super-forms/uploads/php/files/hlpfshg5lvkt9nfnak4pumktln/8962208585.pdfIn PDF document text
    • http://parejalecaros.com/adjunto/upload/fck/files/xujuxedekomi.pdfIn PDF document text
    • http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613c5b2fdca1f---woridazutusaro.pdfIn PDF document text
    • http://shopgraeagle.com/ckeditor/uploads/files/60118610112.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133f391caf78---2592671468.pdfIn PDF document text
    • https://spacio.hk/attachment/file/59928932203.pdfIn PDF document text
    • http://groupementpecheduloir.com/ckfinder/userfiles/files/risodel.pdfIn PDF document text
    • https://bistro-8.com/wp-content/plugins/super-forms/uploads/php/files/452d92c614468dc6eff9aa204ebe17bb/navabakezenet.pdfIn PDF document text
    • https://nyig.com/files/file/pazumobufutewofuvimirivuf.pdfIn PDF document text
    • https://sklepbonus.eu/userfiles/file/naxizuxobuduwi.pdfIn PDF document text
    • https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161451535cc719---revotax.pdfIn PDF document text
    • http://china-miyaco.com/img/file/20219483812.pdfIn PDF document text
    • https://pianoinprimopianofestival.com/uploads/file/86518594090.pdfIn PDF document text
    • https://korzayithalat.com/spot/admin/fckeditor/userfiles/file/dojatazerinudanavixoboxa.pdfIn PDF document text
    • http://mylodge-naoshima.com/images/blog/file/nekokip.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1614242bf3a0c0---98557677500.pdfIn PDF document text
    • http://www.weilandensemble.nl/ckfinder/userfiles/files/virotoli.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=app+yomvi+para+androidPDF 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_off0000eae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAE1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000102f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102F8 10268 bytes
SHA-256: de883635ba1ff447f453b6a6e7ba73107eef32b2b66631e6782c5172cbec8caa
font_02_sfnt_off000119f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119F7 18056 bytes
SHA-256: 010ab80c89b9d2f81fb225132c79c52ac118ba9b4ffcc9fa460822b1dbca5173

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