Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce69ff915b549144…

MALICIOUS

PDF

86.1 KB Created: 2021-08-05 18:47:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4b0685ca50acd03d3c73fac26ae0a6b1 SHA-1: b5c211e8ef027c0a4c89149066a0971166f216ec SHA-256: ce69ff915b5491441bafe084e1db4545fe196f3d382a70255dcd220d34f4b410
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to potentially compromised WordPress sites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are indicative of a malicious PDF.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

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://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105c7c7a9b8c---garajosa.pdf In PDF document text
    • http://velkoobchod-man.eu/ckfinder/userfiles/files/37504817020.pdfIn PDF document text
    • http://apcmagon.com/userfiles/gosofazedigevogubenusedi.pdfIn PDF document text
    • https://rocksoliddesigns.biz/userfiles/file/gosajamarugez.pdfIn PDF document text
    • https://haltia.mx/sii/ckfinder/userfiles/files/71140617009.pdfIn PDF document text
    • http://ubestsports.com/imager/files/20210708142755.pdfIn PDF document text
    • https://rajaunited.com/contents//files/ripavoma.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2048e17f4---1884845150.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609011fe60ed6---firuvivexor.pdfIn PDF document text
    • https://slavica.ru/wp-content/plugins/super-forms/uploads/php/files/91c8eb3ad7228ab7b92824a708d5444a/zikuseromib.pdfIn PDF document text
    • https://global-brand.net/userfiles/files/kadevixat.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/risegagedujejukaweno.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/d33a0476da157d91570d60c3dba1b181/loniwavivaf.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/48559749701.pdfIn PDF document text
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb5270477b5---21445415807.pdfIn PDF document text
    • http://www.ibadirect.com/wp-content/plugins/formcraft/file-upload/server/content/files/16103bcf8e0a79---69274560949.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/2649555512.pdfIn PDF document text
    • http://trlgpc.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/44547239475.pdfIn PDF document text
    • https://www.criteriainvest.com.br/wp-content/plugins/super-forms/uploads/php/files/j1mv99h264nasmrsl527cdqul2/jokisomu.pdfIn PDF document text
    • https://mindspacepsytherapy.com/upload/ckfinder_temp/files/20210707090128.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/ruzeguku.pdfIn PDF document text
    • http://www.phonefixcomo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a34c162d619---2838032699.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/16105cb306def0---76718311196.pdfIn PDF document text
    • http://launensia.cz/ckfinder/userfiles/files/41510932935.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c14bd34ba40---96342541890.pdfIn PDF document text
    • https://hotelritariccione.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c546bb954bc---30242088439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=fundamentals+of+fluid+mechanics+7th+edition+solutions+slidesharePDF 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_off0000e9cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9CB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000101dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101DD 17512 bytes
SHA-256: 14fe6b573735e2b44b6d1d622f003b4ea7b8a53a689b2978fa291f2db8cd95c9
font_02_sfnt_off0001302a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1302A 10868 bytes
SHA-256: 36fa32c3fd2ba475db137a74d6dce5d136d9a8ec4ec01491580b7c045c78f707