Malicious PDF — malware analysis report

Static analysis result for SHA-256 1b13e2ee3e5b26c4…

MALICIOUS

PDF

74.3 KB Created: 2021-05-28 11:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 72d5b1f1c3b37a7381e4a9b92138b1c4 SHA-1: 943b10d7786bb99c95238a8f702b4046a78f5629 SHA-256: 1b13e2ee3e5b26c4944ab24936af40f1f2011d2c5ca8e47f5a4427cfc52f99f6
126 Risk Score

Malware Insights

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

The PDF document contains multiple links to external resources, many of which appear to be hosted on compromised websites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The embedded URLs suggest an attempt to redirect the user to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • 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://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/1b64c382c30822829bdb8abb2034033e/84044697695.pdf
    • https://soudurelauziere.com/upload/editor/file/41212402905.pdf
    • http://xn----8sbaqfskngn1qi.xn--p1ai/userfiles/file/72753940675.pdf
    • https://www.demetagras.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738c9636c03---jobidebirututaxiwenewax.pdf
    • http://buildinggodskingdom.com/webcms/file/xulifuxixitipipam.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608ee7f176857---vevogetanagepozigekodi.pdf
    • http://bkbflooringusa.com/userfile/abbey/file/jelolemam.pdf
    • http://romanakladatelstvi.cz/userfiles/file/ragunafojeranus.pdf
    • http://adamlegal.com/userfiles/file/sulogosepu.pdf
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/30a41c002c4d5e3e3c0970973acea5ed/dolewuvejomo.pdf
    • https://www.lightingsolutionsal.com/wp-content/plugins/super-forms/uploads/php/files/27466edf7d1c89d0108dc5dffc910c0d/6648513470.pdf
    • https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081585327bca---mofinetikax.pdf
    • https://acethamessecurity.co.uk/wp-content/plugins/super-forms/uploads/php/files/611793a3e43d8414dc82e8614010434f/gogopumufuluvajufidat.pdf
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/160a3cc842caaa---mobakojozudiv.pdf
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6fec33b17---voxolumulerapele.pdf
    • https://gradeagroup.com/wp-content/plugins/super-forms/uploads/php/files/1ih2o4hgfkuhub5p3v8s76uvsn/74926210109.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=hollywood+movie+in+hindi+dubbed+free+download+mp4moviez
    • 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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3c3.bin
f55604673484b04d1bc81682f8a3dd7e5303592970ff4a8e4760669190c74e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3C3 5596 bytes
font_01_sfnt_off0000f6be.bin
80d91b238caffa2533d5b09e69fb221b1bda7d66915b409fbd221bd0ce3c19df		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6BE 10756 bytes

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