Malicious PDF — malware analysis report

Static analysis result for SHA-256 27ccee690f35566c…

MALICIOUS

PDF

78.1 KB Created: 2021-09-06 01:38:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0d6b067141258a05f39c2ab2a581cd3a SHA-1: c429615adc349ee00dcad92cf07655a1c9eae976 SHA-256: 27ccee690f35566c7a1c58761c4f8c8012736f188b346921bfb1252e7502c503
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URLs, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm to redirect users to malicious content. The presence of PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports this, pointing towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9844

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://inwebjor.ru/uplcv?utm_term=coastal+erosion+pdf PDF link annotation
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/f9r2d0r9ir953vk2hagrud0hdi/86647595305.pdfIn PDF document text
    • http://ducthanggroup.com/webroot/img/files/51375416355.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/93bc0f6fb5242fae4bf4fcf10b789e15/5598627188.pdfIn PDF document text
    • http://makassitools.com/userfiles/file///52775361783.pdfIn PDF document text
    • http://pinturasoltra.com/images/slider/files/xirosexok.pdfIn PDF document text
    • http://greenlivinggarden.com/htdocs/UserFiles/file/zewivupatebetorideloru.pdfIn PDF document text
    • http://engcaphone.com/_UploadFile/Images/file/webadom.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160957b0969009---lilugi.pdfIn PDF document text
    • http://opuspointpartners.com/ckfinder/userfiles/files/nularamonakizemazad.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/67f8ec649ae7cfa445a4352335ad6fee/robidutumirediwa.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/dijixokikubidabifefito.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/53003924750.pdfIn PDF document text
    • http://market-oborudovanie.ru/upload/file/83959638905.pdfIn PDF document text
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/dkbcole89h74s8indh7j7uc2f5/89606140974.pdfIn PDF document text
    • https://aspirans.com/files/file/72524313159.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/84dce03a161f797dfa2e8f67718fe1f8/35106398677.pdfIn PDF document text
    • https://hotelite.in/userfiles/file/laxipoveze.pdfIn PDF document text
    • http://tmacfashion.com/ckfinder/userfiles/files/78499601678.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7d576cd0e---83824276407.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/eqnbfr284ao6s0k4iuhgq9e6l3/wivewituwijegu.pdfIn PDF document text
    • http://goodfortune.hk/UpLoadFile/file///2506396517.pdfIn PDF document text
    • http://austral-immo.com/userfiles/files/nixomegokowozamotij.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/aa3cda45d780e1d5ca0f8861218b872a/simufarisezurujumo.pdfIn PDF document text
    • https://textosolutionslinguistiques.ca/upload/editor/file/nejexumefalaxejegatasomom.pdfIn PDF document text
    • http://thegibbsfamilyreunion.com/clients/d/d9/d929505c7faf6263097cc97620c39d65/File/befiwokezazadetekobigaw.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/44195404643.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/gv58ii6fofv83m72dqnogllj6t/jexojorof.pdfIn PDF document text
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083748bf16cc---43124866841.pdfIn PDF document text
    • 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cfed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCFED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e7ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 16656 bytes
SHA-256: a2fee83c67ca0b12e10aa984d7ceb8864e3274800746ba81859796ac81a94fca
font_02_sfnt_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 10520 bytes
SHA-256: bdb8cbf69d783c1d64362c59bf93c08014abbcbe1714761e462c27e84bde99eb

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