Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a752fe0c191fee…

MALICIOUS

PDF

81.7 KB Created: 2021-07-19 16:49:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ad08f2a8e4dcdb1f94dbc982fc5e03f2 SHA-1: 0712fe73fa6681d1c1ff3c860c10769710fea32a SHA-256: c0a752fe0c191fee4bf5cb6c38080a9afadfa0b824a536cce3fa69c9de5899b2
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous embedded URLs, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document body is heavily obfuscated and appears to be metadata rather than user-readable content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

Heuristics 6

  • 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.
  • 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 https://pointsourcegroup.com/wp-content/plugins/super-forms/uploads/php/files/5e906f955dc8399c60d1f36a358c6d9f/89126123324.pdf
    • http://sola-brothers.com/userfiles/file/51285124270.pdf
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ad229fd3dfb---mixikumamofow.pdf
    • https://mariapolis.net/ckfinder/userfiles/files/57247075486.pdf
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/6c09b32ef7f9d106321f638307ed225d/23502999443.pdf
    • http://amako-ra.com/wp-content/plugins/super-forms/uploads/php/files/0260f1b33f306d0ea172d23955bb09a1/62406249247.pdf
    • https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/srve8uapcp0h0vpmi1cpc6fcl1/41640497876.pdf
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/bhluijtlpjhk05r9v1t9sk272n/kaloxigidugigeletatorozo.pdf
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acac5256304---sakabo.pdf
    • http://canevinclassof70.com/clients/6/6b/6b8b8ee0d314e59372afbcb75100d768/File/85231078771.pdf
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160f2bda188c1a---tetamarigaxugadoz.pdf
    • http://giadinhlaurenso.org/upload/files/kajeler.pdf
    • http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/bazajef.pdf
    • http://networkinglikepro.com/ckfinder/userfiles/files/vulenowetedikirigajowatum.pdf
    • http://dallassymphonyleague.com/clients/1/14/14bb4a025281f1a32078cb68571f7cf3/File/82851327718.pdf
    • https://champion-osk.pl/userfiles/file/togidifi.pdf
    • https://marathonroller.com/userfiles/files/17581418363.pdf
    • http://fouladsazanco.com/Upload/file/74754463936.pdf
    • https://sgcaregiver.org/contents/files/rinogokikenubajikuv.pdf
    • https://pui-vital.ro/msg_media/file/17058084352.pdf
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077065674424---natidelafapu.pdf
    • https://ancoraeducacion.com/images/81223007573.pdf
    • https://www.golddustdental.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084075016c7c---32983027302.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8aba2f0c2---jametevixigumut.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=fundamentals+of+urine+and+body+fluid+analysis+pdf
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9b0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xC9B0 16792 bytes
font_01_sfnt_off0000e1c2.bin
e14830359eaf37e12d7a11c2820df9b6b5cf5aef2c52de4240a9e6b0ed522ec4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE1C2 16516 bytes
font_02_sfnt_off00010cc7.bin
d2e0bbea6cc7d7daaf470ca8ffff3dd60536e78ed7517798a60a9fd5274ed97c
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CC7 10988 bytes
font_03_sfnt_off00012607.bin
853c5283859e02bbe69c7c23cd5e0647c6722076e41c0170e2f2e32202f00f6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x12607 4500 bytes