Malicious PDF — malware analysis report

Static analysis result for SHA-256 60fe0070dafe0132…

MALICIOUS

PDF

98.0 KB Created: 2021-07-04 22:21:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: cece2833e62cad3cd2db4f882b92f594 SHA-1: b9cad024f700c2ff6d3799a52f9ca8e16c54308f SHA-256: 60fe0070dafe01328d98e8b7c7b6e26794666a12da1d467ac0106a976b2a5d22
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 directories or are part of a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. No scripts were extracted, but the structure suggests the PDF itself is designed to lure users into clicking malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9781

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://angelojrobles.com/admin_initial_test/userfiles/file/87844054771.pdf In PDF document text
    • https://reparation-mobile.net/userfiles/file/wimivowutifikerelexasujug.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/5gjdqe3d5bvi0la0ko44o0vfsh/mudinuv.pdfIn PDF document text
    • http://hosungtour.com/FileData/ckfinder/files/20210630_641FEA0C31C8256B.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076b3e52069d---67444332328.pdfIn PDF document text
    • http://www.lauricedale.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607bc40fa00cc---6298558581.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b8a40df30---71547364348.pdfIn PDF document text
    • http://phillipwhiting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ba03d419b8---tasepase.pdfIn PDF document text
    • http://acecaalcoy.com/userfiles/file/kigavubiz.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/7363772a65c9b7c1466da031f13fcc73/sosomamupuxegiwixakika.pdfIn PDF document text
    • http://perfectthesale.com/wp-content/plugins/formcraft/file-upload/server/content/files/160873adf67854---67407458306.pdfIn PDF document text
    • https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607476c04867b---molejutakerutukupigevudor.pdfIn PDF document text
    • https://maidintown.co.uk/wp-content/plugins/super-forms/uploads/php/files/3dd41e2406f622e3b2792cce0f8a4745/nizelenovufor.pdfIn PDF document text
    • https://stefandes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16081f7f99f34b---firifeluduzalosejidag.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/46802925231.pdfIn PDF document text
    • https://www.surajinformatics.com/wp-content/plugins/super-forms/uploads/php/files/e31e58d4e63621329d892fd107677812/niwebabixatepisowetegi.pdfIn PDF document text
    • https://xn--80aaa1anac6cg.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/376cb0ee025ff0439ce59f8a55846e24/buvizujero.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8d73e92248---momofovoj.pdfIn PDF document text
    • http://fcv-bo.org/data/fcv-bo/userfiles/file/ridaxaguborabenopifore.pdfIn PDF document text
    • http://abogarestudio.com/userfiles/file/dorafavifo.pdfIn PDF document text
    • http://xmst.com.vn/app/webroot/uploads/files/17649200594.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/42084452894.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608bd1421253c---mepofixumifofepeg.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=newton%27s+rings+explanationPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A7 10624 bytes
SHA-256: ef0826b732028a2a1f31cc8359397824002aa6dc62a03e5641df9a0f4cd342f0
font_01_sfnt_off00010239.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10239 21284 bytes
SHA-256: 808b5d4a1144fff1cf1ddbb528daa2848cb9a3210aa8a6df140d77608b7603e1
font_02_sfnt_off000138f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x138F3 2580 bytes
SHA-256: 3707d779aa70f758ce014ec30e036cf93a2cafc861c5e24dfdf3adfa6bfce921
font_03_sfnt_off00014417.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14417 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_04_sfnt_off00015c28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C28 18916 bytes
SHA-256: 8cebe41814f12a0c5c19d20d1206825483587a4d0076bb5dd621a51781a9303d

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