Malicious PDF — malware analysis report

Static analysis result for SHA-256 13183ba101aad914…

MALICIOUS

PDF

886.0 KB Created: 2021-07-05 02:49:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 004a7630d5702b13d94b9b047f8f4101 SHA-1: eb1bbf77b734459a470bb20938316dea8d3283f7 SHA-256: 13183ba101aad914c01440cb4c8f464ecdc5c5a7a4d431e92a52e7749ec00e61
112 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to exploit vulnerabilities or redirect users to malicious sites. The presence of multiple links pointing to compromised WordPress upload directories and the ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggest a phishing or malware distribution attempt. The document body, though heavily obfuscated, likely contains lures to trick users into interacting with these links.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4901

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://connect-senior.ch/uploades/userfiles/file/26294778209.pdf
    • https://hirurgija.me//files/96542190568.pdf
    • http://ineke-ott.nl/keramiek-beelden-imagesfile/musutokoputo.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/e58f71122a7fc305818129fbc3d62b75/77402375531.pdf
    • https://www.ogblfrontaliers.fr/wp-content/plugins/super-forms/uploads/php/files/nqn7dqlogq3qm0hamjjcg2eme6/311271005.pdf
    • https://sg-design.top/wp-content/plugins/super-forms/uploads/php/files/21c1f56ef1f48a3cea6313fbcfeb9799/67811800201.pdf
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/d4e8455c4d665b1aaf9d25c92f59087b/divizolupoxedime.pdf
    • https://law.com.sg/wp-content/plugins/super-forms/uploads/php/files/751152e4191c9ec9382f35987f28322d/89838627642.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16082b72f71062---42107079152.pdf
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/u5la4rinf204a62rgq4eb6v02k/83992342814.pdf
    • http://www.bufolari.com/public/immagini/file/pukaf.pdf
    • https://emergent-partners.com/wp-content/plugins/formcraft/file-upload/server/content/files/160854f64bc868---bemezatujuj.pdf
    • https://hinodanang.com/uploads/image/files/lexurejekugagunaxagavuwut.pdf
    • http://majorpropertygroup.com/userfiles/files/99297517789.pdf
    • http://cathyourhair.nl/js/ckfinder/userfiles/files/vuxulare.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f522074ef7---69924122571.pdf
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d623cdcaf8f---93721627854.pdf
    • https://www.numberoneporthill.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16094248d3f6db---kirazukulosojupomo.pdf
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608aeced8b1bd---jofusubepibikutolexewogi.pdf
    • http://palyavalaszto.hu/teszt/upload/file/vuzirubemaxuraxufimuze.pdf
    • https://stopserv.ru/files/file/xifulibifiwesujejini.pdf
    • http://seoulsquare.com/userfiles/file/41505572409.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=seventh+day+adventist+death+beliefs
    • 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_off000d66f2.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD66F2 16792 bytes
font_01_sfnt_off000d7f0f.bin
33eb49d1f6c55e13faf04ebbb83e39caf2ae85935b419a3c50a88098fcabdc9c
pdf-font-stream PDF embedded font (sfnt) at offset 0xD7F0F 17752 bytes
font_02_sfnt_off000dadbf.bin
0ebb607955b9abeef6571b663b0e0f439da14abd54288c1cc743c066c82842f5
pdf-font-stream PDF embedded font (sfnt) at offset 0xDADBF 10628 bytes