Malicious PDF — malware analysis report

Static analysis result for SHA-256 29bbbc1e343a7b03…

MALICIOUS

PDF

81.9 KB Created: 2021-09-05 18:03:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 0299160a79f3c0724a1de54f929294fb SHA-1: 304e0bd0e081a06746bb103e0e604ca408fa2301 SHA-256: 29bbbc1e343a7b03c2b0ac3ffaffb0c72bf2e0ab3bcee07cc31b94c800bc9908
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress sites, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or downloads. The document body is heavily obfuscated and appears to be non-readable content generated by wkhtmltopdf, further supporting the idea that the primary function is not informational but rather to host links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c7426615a94---padejisovijikumiwegowutis.pdf In PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160abd107a868b---vixijosun.pdfIn PDF document text
    • http://vidol.nl/userfiles/file/nadanubexaf.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d973b62f30---99334949171.pdfIn PDF document text
    • http://euro520.net/userfiles/file/1621498020653949117.pdfIn PDF document text
    • https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/f68d90af8680f3c3b8ba2c6450d8de95/vozisokewenojob.pdfIn PDF document text
    • http://www.kizkulesikizogrenciyurdu.com/public/ckfinderuploads/files/xobidivuv.pdfIn PDF document text
    • http://biotledlight.com/userfiles/file///75283153498.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcf4ec8b690---zadebojabijazaralijuw.pdfIn PDF document text
    • https://michaels-limo.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085686192e13---86114778697.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/c046270419e65d6969826633690241b1/mumeposafilufezi.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/90mm3dqekgfme91qkqbf5r7g0f/nasotumolabijeloto.pdfIn PDF document text
    • http://alliance-ltd.com/userfiles/39503661818.pdfIn PDF document text
    • https://sinhadventure.com/uploads/file/jejosozodibopujoji.pdfIn PDF document text
    • http://nuestratierrapremios.com/campannas/file/27317562878.pdfIn PDF document text
    • https://angkalaris.com/contents//files/82962789512.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/78ab6c7172b78466e1f0b0f16d519f8a/39874326755.pdfIn PDF document text
    • http://gayaarchi.com/userfiles/file/20210611111132.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/ea08460eb3209721c274494ef0469cf0/nipesirasexupiwosasamow.pdfIn PDF document text
    • https://businesslife.com/content/file/zugunulavisonavejoxebe.pdfIn PDF document text
    • http://arohitourandtravels.com/userfiles/file/56252695831.pdfIn PDF document text
    • http://kahounova.cz/userfiles/file/98757614344.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/fp48cho8m6pa7gcf94fjqrhhie/90930503839.pdfIn PDF document text
    • http://modelkyujin.com/wp-content/plugins/formcraft/file-upload/server/content/files/160722c16ebc95---45274675788.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=half+life+calculations+worksheet+quizletPDF 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_off0000d9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD9A9 17908 bytes
SHA-256: 31cef37a78edc058f0743f8724cef44045921e15250bc0d7a1582cced2b8aeb8
font_01_sfnt_off00010892.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10892 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000120a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A9 10908 bytes
SHA-256: 1ec4a7bbc8a297701631c080306740d3e25378b3bcb60e1301f894b29debe766

Open this report in the interactive analyzer, or submit your own file for analysis.