Malicious PDF — malware analysis report

Static analysis result for SHA-256 62466d12f28ab99d…

MALICIOUS

PDF

92.1 KB Created: 2021-08-14 06:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d6411619eb8fa62dfa4588986d5d7801 SHA-1: 2f0889a5a8c2c56023e3168f8bec085f5eb6dbdc SHA-256: 62466d12f28ab99dad80449f80929327a3facd76adf35bf83ab26912eee73f85
156 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress upload storage and other disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs and link farm structure suggest an attempt to lure users to external malicious sites, potentially exploiting vulnerabilities or delivering further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9913

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://kperrylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/60548271015.pdf
    • http://esangsok.com/upfile/files/17500119505.pdf
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/13075d18f15743373afad24fe6cd19e9/82925167155.pdf
    • http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608146a755675---xogolukeberotojirelijufe.pdf
    • https://kaxtongroup.com/home5/maxconne/public_html/kaxtongroup/assets/images/newspostimages/files/jiketojiluvulizeva.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b66ef387342---27126900630.pdf
    • http://school19-zav.ru/userfiles/file/79431719281.pdf
    • http://camonetinternational.com/files/file/noxadofodigebit.pdf
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d4f5c56a9ad---kagutevikituxefiduzasol.pdf
    • http://sarlampa.ru/upload_picture/96104489906.pdf
    • http://audiencefertilization.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/60288968627.pdf
    • https://0286869143.com/editor_images/files/bakebifowekawudotuz.pdf
    • http://thingsantiquesla.com/userfiles/files/66373553256.pdf
    • https://www.indoorclub-informa.com/boletines/img/file/71770309696.pdf
    • http://global-insurance-broker.de/downloads/fanexoviwegoneko.pdf
    • http://uniquecharacters.com/upload/files/vilugedufesose.pdf
    • https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/tuosmfjcoht8kdfs04mhuiqb86/29018855310.pdf
    • http://nuyewpilot.academy/wp-content/plugins/super-forms/uploads/php/files/8ee694c097cb8a362964ff294a837abb/52929194126.pdf
    • http://winhazel.com/indigo/ckfinder/userfiles/files/nesojedimakoso.pdf
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160861fcaad195---92815701456.pdf
    • http://unewstoday.com/task/userimages/file/5076367859.pdf
    • https://fceresources.com/ckfinder/userfiles/files/49566900046.pdf
    • http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/4uelkvcli4ihltv0pcan2o997c/23389133775.pdf
    • http://sms-dk.com/FileData/ckfinder/files/20210722_61F1F976E810EC20.pdf
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1562c2a027---xuluresewegegofaxag.pdf
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858271c2b84---6122639699.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=lana+del+rey+full+album+free+download+mp3
    • 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_off0000fca2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA2 16792 bytes
font_01_sfnt_off000114b9.bin
07d8d2df3e9ab645b36dc90cee73aec374141a719e44e962c5e099d455535fee
pdf-font-stream PDF embedded font (sfnt) at offset 0x114B9 10872 bytes
font_02_sfnt_off00012da5.bin
706ddd87648b016f409205e4972b3c8645673bb87b0edb50db2de989a96b5d72
pdf-font-stream PDF embedded font (sfnt) at offset 0x12DA5 20224 bytes