Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dcafae47f330600…

MALICIOUS

PDF

101.5 KB Created: 2021-07-19 06:44:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c7d03eeed9cee49411ede5319cf9ce7c SHA-1: 616cbb0c4f45742b9741b72f2f720a5ca61807e1 SHA-256: 2dcafae47f3306001f8ccb817cbdf221f562c821044be148831c9481e8ae8836
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many of which point to compromised CMS upload storage, suggesting an attempt to lure users to malicious or compromised sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution via these links. No scripts were extracted, and the document body was unreadable, limiting further analysis of the specific lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9923

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 http://hpmcfamilyreunion1968.com/clients/83891/File/11578813397.pdf
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/9981b3f85efbad93f5045fa1fe962f59/fezezavafud.pdf
    • http://rauvuonsach.net/images/uploads/files/jumapabufojemogaru.pdf
    • http://carolstoecker.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/50866402298.pdf
    • http://jedwines.com/cmsCart//upload/file/664016464.pdf
    • https://tangentemag.com/img/file/kilekiraliwigus.pdf
    • https://advantagelic.com/singhania/downloads/file/91809850953.pdf
    • http://vigova.com/Images_upload/files/numitugiloraka.pdf
    • http://ji-tien.com/userfiles/file/zozidemagobapiva.pdf
    • http://2ds-creations.fr/userfiles/file/zozewiwaf.pdf
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/573a69f43b4bf829f4cc93373995d37c/rinorode.pdf
    • http://baheth24aqari.com/ckfinder/userfiles/files/70269928017.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c7ab23c309---xufoxojedufepuzuzom.pdf
    • http://www.catalogodecineargentino.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb40336b7b---638187949.pdf
    • https://angkoronetour.com/userfiles/file/50738682522.pdf
    • http://susasoft.com/upload/userfiles/files/54555501863.pdf
    • https://dermatologie-chamonix.com/userfiles/file/14655300144.pdf
    • https://andrejc.si/files/file/34889882245.pdf
    • https://easresidence.ro/app/webroot/files/userfiles/files/52230878808.pdf
    • https://realwebguys.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098b5b63a68e---fobaxanilaxamutagenawan.pdf
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/qis784bmhdb9ff0f9kqgsdjte1/73040478620.pdf
    • http://kimbuunguyen.com/uploads/userfiles/file/68554099421.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ce80eaadf13---7144101590.pdf
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/9fc4a51227392cd5e19ca491ec36f27d/mabupupigokopozixobakodiv.pdf
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/8e58c4071e44c220f3dabc97b520d8a2/nolegedijokisotizojokuj.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=henna+mehndi+design+simple+and+beautiful
    • 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_off0001285d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1285D 16792 bytes
font_01_sfnt_off00014074.bin
f1d1a1414b8e93f9c6cc4f3caa23b364843f3806d01a272bdaf25dd3abfca6b9
pdf-font-stream PDF embedded font (sfnt) at offset 0x14074 10956 bytes
font_02_sfnt_off00015918.bin
a9135f3631b6208e95420c9dab107d0b7526fabb018ae3d2511bd9f357d16ea8
pdf-font-stream PDF embedded font (sfnt) at offset 0x15918 17616 bytes