Malicious PDF — malware analysis report

Static analysis result for SHA-256 00dfc3c0c0f48952…

MALICIOUS

PDF

82.4 KB Created: 2021-09-07 16:51:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 39b3aa386a0962e8049b40ece31656fd SHA-1: 58774c79f34195fd30d0c462b76ea3b3d4d72cbc SHA-256: 00dfc3c0c0f48952661e64d8f240d9b1d1d8054f3e776a6e60be00dc7033004e
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised WordPress installations, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160735ba49521e---9506343725.pdf In PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16072b71012bfd---bodajixabisamanu.pdfIn PDF document text
    • https://www.hosotte.com/ckfinder/userfiles/files/sujumexokoxat.pdfIn PDF document text
    • http://seabeachthailand.com/UserFiles/file/putufobemuvilage.pdfIn PDF document text
    • http://navrattan.co/userfiles/file/jetez.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/je0tcl3o4tlk9e24g63r4d3p20/61505036174.pdfIn PDF document text
    • https://ttnthailand.com/upload/userfile/files/volowugarem.pdfIn PDF document text
    • http://guerrazzi.info/userfiles/files/53332321380.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071691ccb29e---xaluz.pdfIn PDF document text
    • https://realestateconnect.pro/wp-content/plugins/super-forms/uploads/php/files/4idjg5ss15thb5becu3molmkh7/82326612835.pdfIn PDF document text
    • http://yingtailong.com/upload/file/210901131237706023ebo8i9b9s4nb.pdfIn PDF document text
    • http://gostium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4de0117c9c---gikevogivi.pdfIn PDF document text
    • http://klaaswester.nl/img/file/zekanezifetigak.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/bipigigibo.pdfIn PDF document text
    • https://torrentclub.vip/wp-content/plugins/super-forms/uploads/php/files/34meb2u5me81am1nm77qp8mimd/babikefepiva.pdfIn PDF document text
    • https://aucordechasse.fr/vosImages/5969948753.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/55931116834.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/tosasapixaxizogamabo.pdfIn PDF document text
    • https://www.alertgy.com/wp-content/plugins/super-forms/uploads/php/files/df4bb9ce48487433d6556f324900143c/5077690722.pdfIn PDF document text
    • http://moderncarrent.com/user_img/files/45145038668.pdfIn PDF document text
    • http://niestachow.pl/data/aktualnosci_imgs/file/luxodogumanune.pdfIn PDF document text
    • http://clarksville.net/wysiwygfiles/file/fapakonenunipirelaliwewe.pdfIn PDF document text
    • https://almudenafernandez.co/ckfinder/userfiles/Files/89538438739.pdfIn PDF document text
    • https://tatsolarlight.com/uploads/files/44810959548.pdfIn PDF document text
    • http://penzionnakrizankach.cz/ckfinder/userfiles/files/95743332568.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/rogagarozex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=our+planet+netflix+worksheetPDF 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_off0000dae9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAE9 18484 bytes
SHA-256: 62cfeb055c6417869c806529a49aaf22df5140ff99aef98548b735f13895f5cb
font_01_sfnt_off00010a8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A8B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000122a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122A2 10860 bytes
SHA-256: 383b648231b61948d0cf6fd1d1e942b095b13e8ff559c5ca86d443d63d5df03a