Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f05980748b4199a…

MALICIOUS

PDF

79.6 KB Created: 2021-08-16 06:53:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 86acce8e8c87fd129c318db5fecc9001 SHA-1: 7babc6a455a302aa94ab7d00eb0661d97ade588b SHA-256: 0f05980748b4199a11d20b9c8e2976ab92a7d6df4a558ad4e9228f92aa1d685d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and heuristic firings suggest this PDF is used for phishing or distributing further malware. No scripts were extracted, but the structure and URL patterns are consistent with malicious PDF lures.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4361

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://infrive.ru/uplcv?utm_term=what+is+pms+color PDF link annotation
    • http://quickvideo.nl/userfiles/file/tuvugigewutetareg.pdfIn PDF document text
    • http://digemnd.com/UserFiles/file/mixuja.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/e4b529a843f58fef13cd0863a23b5bc7/36773408489.pdfIn PDF document text
    • http://heryeryesil.com/resimlerfiles/47114282054.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/83c6e3b8f677753c65db70f07563c2b7/firororilakotonezu.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160ed34a9b7880---sikuwalegojowivevova.pdfIn PDF document text
    • https://aldea.work/wp-content/plugins/super-forms/uploads/php/files/4f14cb99152354b532808bd34f62c5a6/giruzuz.pdfIn PDF document text
    • http://schokofontaenen.de/idata/vovopas.pdfIn PDF document text
    • http://cnhhgj.com/upfiles/userfiles/file/fipakelexamilijazevixakol.pdfIn PDF document text
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69096b8dc4---sawosob.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/863c3fd63dd1c57d6c70824b1918c370/gajodowi.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160a36b7766992---vemuze.pdfIn PDF document text
    • http://dfwsedan.com/nbloom/fckuploads/file/napizaduk.pdfIn PDF document text
    • http://extintoresorigen.com/images/editor/59719105137.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/wizawumabenazegozujero.pdfIn PDF document text
    • http://mu-rrrc.com/userfiles/file/mijudukafemejijujom.pdfIn PDF document text
    • https://bluebeakbranding.com/wp-content/plugins/super-forms/uploads/php/files/602f8f7fe6960bd702e096d17a645897/vixafigozavatuf.pdfIn PDF document text
    • http://caratow.eu/userfiles/file/nezemusetosutewuvod.pdfIn PDF document text
    • http://wshs67rocks.com/clients/9/94/942520bde836a0b401740df6f3d23d35/File/jamuxevagufuve.pdfIn PDF document text
    • https://latrinquette.com/upload/editor/file/84766828422.pdfIn PDF document text
    • https://serpavenger.com/ckfinder/userfiles/files/jowevusepurosagemoluvezub.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/b7d4bfa041d6830003f737d055201851/sajikexiwabewifikugifu.pdfIn PDF document text
    • http://xn----8sbxab3abskk3a2j.xn--p1ai/media/file/jesutegawibuwofenulamug.pdfIn PDF document text
    • http://www.udelimpa.es/ckfinder/userfiles/files/folari.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16080a72276001---28100731349.pdfIn PDF document text
    • https://www.helpforbusymums.com/wp-content/plugins/super-forms/uploads/php/files/b77326a5f2afae1117cd820b4897be6a/23440179808.pdfIn 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_off0000e2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EA 16328 bytes
SHA-256: 903e0e3d8069357ef371f366ac5909f17c5d88bd1b844ac77c6b4228d6901489
font_01_sfnt_off00010d56.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D56 10396 bytes
SHA-256: 1120d83e919cf593159b6d66e94568df2d17d1711cc2312a4e4aa6a45368183b
font_02_sfnt_off000124da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x124DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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