Malicious PDF — malware analysis report

Static analysis result for SHA-256 d16670df9c809d09…

MALICIOUS

PDF

76.5 KB Created: 2021-09-01 14:18:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 075d9b118cedea12a1cfa62ffc8b9da7 SHA-1: 201c9be8900a35db01bf15cd5f44f4a3a6be12bb SHA-256: d16670df9c809d094d16c2b8f9a0db4fe5b55e9118f2119e392e63438b6019c9
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains numerous links, many of which point to compromised CMS uploads or disposable hosting, indicating a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, so the primary attack vector appears to be the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://digireg.cn/upload/85770593831.pdf In PDF document text
    • http://verkaufs-akademie.com/userfiles/file/wikaletixexig.pdfIn PDF document text
    • https://artbynela.com/uploads/file/68819291220.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b730b8ff1c---22941375472.pdfIn PDF document text
    • http://leeharringtonhomes.com/userfiles/file/jugofogelesononojuvige.pdfIn PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/16087b68a5dc39---44505787414.pdfIn PDF document text
    • http://suvagcentr.ru/userfiles/files/fifisatebodupofu.pdfIn PDF document text
    • http://hersheyhigh1981.com/clients/37302/File/gajamakav.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0daf959455---xibovejawutez.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/15cb089e0538d87ab326d48fba4d9785/boxuganavevobisibepejino.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16127c536b6e34---67397956628.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/e2b2b4e3fdf2dd732498cf85a67df2a5/12273068890.pdfIn PDF document text
    • https://edarky.net/data/file/70536450849.pdfIn PDF document text
    • https://gs-hemeringen.de/ablage/userfiles/files/xexojiselowelumageb.pdfIn PDF document text
    • https://dungcuruamui.com/wp-content/plugins/super-forms/uploads/php/files/cv4qt3vjma1opt1rq2t7bcqnak/20703801882.pdfIn PDF document text
    • https://acp-luxusingatlanok.hu/ckfinder/userfiles/files/56722613453.pdfIn PDF document text
    • http://csc-020.com/userfiles/file/20210713065948_cxzz3c.pdfIn PDF document text
    • https://borderpak.com/wp-content/plugins/super-forms/uploads/php/files/d0be0652c1f4fadcf5aef48d9dbf25b3/74284524748.pdfIn PDF document text
    • http://dorinhawear.com/admin/fckeditor/editor/filemanager/connectors/php/fckeditor/editor/filemanager/connectors/php/userfiles/file/28854880260.pdfIn PDF document text
    • http://shengnabei.com/uploadfile/file///2021081714592667.pdfIn PDF document text
    • https://airin.lv/images/userfiles/file/29438564224.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/16076955de8ead---jabizifotidewa.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab658009fce---590505863.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/t0gcsgm3vpj212eb1i8kkc425m/43617167361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=blue+is+the+warmest+color+watch+full+movie+online+freePDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC748 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000df5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF5A 16856 bytes
SHA-256: 830df2d3b9711ab09d94d4c6b7b5af6c6ede34f4c6aa347eb5ff4e1c5460f434
font_02_sfnt_off00010a08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A08 10904 bytes
SHA-256: 95469d776dda86fc9ba6e59c3348f7184123d52dd141dcab13d84986c3d5b25d

Open this report in the interactive analyzer, or submit your own file for analysis.