Malicious PDF — malware analysis report

Static analysis result for SHA-256 d06817988bc180e6…

MALICIOUS

PDF

81.9 KB Created: 2021-09-01 01:47:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 754a71618eae49f027b64ef26f4c9890 SHA-1: 05f5edf01261cc370b63880322466f86cc76421e SHA-256: d06817988bc180e62b23c9a413248d79b0130f2670416ed899488710bd6bd8f7
156 Risk Score

Malware Insights

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

The PDF document contains a large number of links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery via these external links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://betentour.com/sites/default/files/file/15534171290.pdf In PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/07c8a766650ff7b97cc807070b893df5/kisakirovipukomero.pdfIn PDF document text
    • https://lomasdelaweb.com/userfiles/2008.09/file/sigizobixemexureg.pdfIn PDF document text
    • https://keralahappyjourney.com/ckfinder/userfiles/files/75319084098.pdfIn PDF document text
    • http://beveragesgs.com/userfiles/file/45299722954.pdfIn PDF document text
    • http://rebornfair.com/FileData/ckfinder/files/20210818_49E4B272583F277C.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/79116648728.pdfIn PDF document text
    • http://geluidsadviesnederland.nl/ckfinder/userfiles/files/wazivevaxoragotizuf.pdfIn PDF document text
    • https://nhahangthanghuong.com/uploads/files/72752142728.pdfIn PDF document text
    • https://mikepromedia.com/wp-content/plugins/super-forms/uploads/php/files/1ac5758b4dc7ab646b4a06621c2fe990/xakinewugewuf.pdfIn PDF document text
    • http://cdmvt.cz/sites/default/files/pufaja.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/511rte8saigfr5pbi3f0s97fcl/29618916898.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc5d90a42b---29945058146.pdfIn PDF document text
    • https://an-professional.ru/img/files/file/65343658767.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ace6aeaaec0---11468527721.pdfIn PDF document text
    • http://violetstudio.in/userfiles/file/gokixogosonowajavapiri.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/sosutipijebizeze.pdfIn PDF document text
    • https://menu2uplus.com/images/file/71388925584.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/c799720135912d24a18038f5c0193623/morilezufisodirexo.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ea0af9d3fa---22660367048.pdfIn PDF document text
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/4669f9282d0af9bc0a4a94ff82efc442/64989865771.pdfIn PDF document text
    • http://havefuntogether.com/image/upload/File/21851473550.pdfIn PDF document text
    • http://xn--2-140-swe8h.xn--p1ai/files/wetepajadozov.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1612782f85e3eb---jawakipiwitunojos.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/d984e099383dde131205b32323fa67d7/donajozoxa.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1606f606de2554---nuxegafopigiwomuraxutigaj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/ngfLrbzwjls/uplcv?utm_term=the+five+personality+traitsPDF 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_off0000de9b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9B 16604 bytes
SHA-256: ad08916e70600da3da00a8eb089b24f5f7d0fc576bf1aeb73ad290dae54ba459
font_01_sfnt_off00010977.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10977 10596 bytes
SHA-256: bcb896f869e4ab6e36f6910c23471cc0b2c78a59b49c6316f4508361f10a025d
font_02_sfnt_off000121b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1