Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a729a09d98dd9d6…

MALICIOUS

PDF

87.5 KB Created: 2021-06-27 21:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 1df9f1f33bcb6c487108f0b36da2e26b SHA-1: 64a6de2abb06db54edbbc15adf063241a25858a4 SHA-256: 5a729a09d98dd9d6d0456e24db7ded6b47ad924570afcd437fb4912bcf9fce68
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious. It functions as a link farm, containing numerous URLs pointing to potentially compromised websites or phishing pages. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for these links, suggesting an attempt to obscure the true destination or evade detection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9835

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://meruzhankhachatryan.com/app/webroot/files/file/zoxujiwubujof.pdf
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/6581g8h9e09grc6kgk52fmdado/lenanidak.pdf
    • http://kameleonhastanc.hu/files/file/62935638437.pdf
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/3c60d5f1d2534a2c94bf0f7afb3db7e0/dixunupupudufesudesokor.pdf
    • https://paklya.su/design/img/upload/file/14789010358.pdf
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/u171trhmmci06kurcgud31jssv/2719393331.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/6hkqm7hs0b2qodmcqb69ltovd5/12814320802.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/4d7ed6a0e7be49129ae64dc947d3578b/tukijapuvo.pdf
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16096fdd385166---42204500311.pdf
    • https://betalinktech.com/blmedia/file/34420731181.pdf
    • http://maternites-catholiques.org/ressource/site-image/files/72906361834.pdf
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7591dddc6---45439486198.pdf
    • https://noks.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160d3b52c0cd38---gaberilabupisivi.pdf
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a1395fe8ef2---pigiwepumetabiki.pdf
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cb9e85cdde---pikupivekipovitididagebu.pdf
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c04f9c5e0e4---42402758169.pdf
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071ad6ac3ae2---76756920089.pdf
    • https://evenimentecastel.ro/wp-content/plugins/super-forms/uploads/php/files/8ufvml6l847eqnchurbs2f9d5b/jisilijikoz.pdf
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/64175b9fca03705218fe9b60e6691cb3/40062199693.pdf
    • https://whitelightdesign.com/wp-content/plugins/super-forms/uploads/php/files/3f02d06e40c127c0e1c9ed6b64ddedd8/24886893044.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/ve0u4j1i5r05o7imfuuo7lsce2/wipisadukel.pdf
    • https://mziagroup.com/wp-content/plugins/super-forms/uploads/php/files/4ohcj0fhievki97ru1fro7me7s/zepupikozakifanewe.pdf
    • http://synerfreight.com/syner_upload/images/files/47472311259.pdf
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3b6d9b8e96---depapagefonakipukivupon.pdf
    • https://leosservices.com/userfiles/file/mejugeluvimofozagemabedo.pdf
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/f5641ddc46b2c7d27f5d68bfc443e8c1/13596842711.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=dylan+minnette+drake+and+josh
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f008.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF008 16792 bytes
font_01_sfnt_off0001081f.bin
e71c1e8581222d6320525f373ebe9ab37bc3a8de52cd52a6dd03e14a3837cacc
pdf-font-stream PDF embedded font (sfnt) at offset 0x1081F 10852 bytes
font_02_sfnt_off000120ea.bin
6f866d5c6e1ce08da53f10dffb8cdf2b226014a716218356073783f6c571c122
pdf-font-stream PDF embedded font (sfnt) at offset 0x120EA 17692 bytes