Malicious PDF — malware analysis report

Static analysis result for SHA-256 94396d8bf196ebd9…

MALICIOUS

PDF

114.3 KB Created: 2021-08-13 09:32:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 085f68294844b9d5ae28e61fc5723874 SHA-1: 04a22bdee7fc05a0eb381e655b83f27acd2dbe1b SHA-256: 94396d8bf196ebd901e36a5d19ca1ef36221a7930cbc36c136ba76da07d87f88
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links hosted on compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content or further downloads. The presence of a 'download button' heuristic further supports the lure-based attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a7e19b04b32---2999058925.pdf
    • http://naosgym.com/userfiles/files/fadiwoxibaf.pdf
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/04ecdced7a7ce178ccee694aff938a68/30511679849.pdf
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160d0375dd2dd3---42191279804.pdf
    • https://mudrun.com/home/mud/public_html/ckfinder/userfiles/files/13213362165.pdf
    • http://digitalpolicycouncil.com/imagenes/file/vixapakexulazitan.pdf
    • http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/9707f07c6188d49f073617cb5a056bef/26829375061.pdf
    • http://prasongp.com/file_media/file_image/file/83997723192.pdf
    • http://taborcapitalpayment.com/clients/d/d0/d0a3925ee25d0adc8806453b18bccccc/File/godumabobajur.pdf
    • https://www.accidentinjurylascruces.com/wp-content/plugins/super-forms/uploads/php/files/rladjcumflf8tu6icgukp7n3f8/62905922605.pdf
    • http://thelewisfamilyreunion.com/clients/c/ce/ce72a6ed4f7059d305e3bbfb121cee90/File/xizavisa.pdf
    • https://cvsc.co/userfiles/file/75693752337.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075fd07b97d8---30318687655.pdf
    • http://artpolyclinic.com/file/files/96422928081.pdf
    • http://solemarservizi.it/userfiles/files/13731718118.pdf
    • http://studiostocchi.eu/userfiles/files/ditopivonogosifu.pdf
    • https://prosegik.com/wp-content/plugins/super-forms/uploads/php/files/737076e8e4e99d3d003a61fddc393f82/28172741364.pdf
    • https://godparents4tz.org/home/god/public_html/ckfinder/userfiles/files/zapuwufo.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/adddec89e55e0c463019f0f816cbaf7c/vapadogijojezituke.pdf
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b299b4b733---gavexogalovupom.pdf
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/69d5bf3739e7af81bcd1a312f823dbde/lugosimekafawim.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160767f5e30ce8---57442643684.pdf
    • http://thai-apsproducts.com/file_media/file_image/file/milirujo.pdf
    • https://flycam.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1609842efcecf3---vipotatewozut.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=fnaf+4+unblocked+games+77
    • 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_off00016048.bin
8101e3fd19a5cdb47808830d0b3cd3a663bf4f4118bc1fbfa1fb5c7d50638b58
pdf-font-stream PDF embedded font (sfnt) at offset 0x16048 15900 bytes
font_01_sfnt_off0001891c.bin
e690741fdc67087b604e5d896d08984b6d0c2ce35c7fa028529eadc6585ff450
pdf-font-stream PDF embedded font (sfnt) at offset 0x1891C 10964 bytes
font_02_sfnt_off0001a273.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1A273 16792 bytes