Malicious PDF — malware analysis report

Static analysis result for SHA-256 d02f3ebd5c06c1f9…

MALICIOUS

PDF

81.1 KB Created: 2021-08-17 08:20:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 4346c4109c8a4894c66b62122be05d37 SHA-1: 22c99854c3b75b5949c6edf59a09ec92000a57b2 SHA-256: d02f3ebd5c06c1f98168044a1495e5741ba6196453f3b5df9a263cb92a8274d7
156 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Several heuristics indicate the PDF functions as a link farm, pointing to numerous compromised or disposable hosting sites. The embedded URLs, such as http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096477580727---19999720069.pdf, are likely used to distribute further malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/8f217c7794f1215d8e8ab4e112ce2bcb/fejotoduri.pdf In PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/16096477580727---19999720069.pdfIn PDF document text
    • http://gr-chem.com/upload/files/moropemipawen.pdfIn PDF document text
    • http://utuin.net/files/fckeditor/file/fokuvosiw.pdfIn PDF document text
    • http://thuephotocopytaihanoi.com/upload/files/25253497378.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/82603648571.pdfIn PDF document text
    • http://thicongdiennuocmiennam.com/uploads/files/72391706618.pdfIn PDF document text
    • http://nowyhotelik.pl/userfiles/file/25774787513.pdfIn PDF document text
    • https://optical-axis.com/uploads//files/202108042146422794.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/nanevexu.pdfIn PDF document text
    • http://wirheiraten.de/images/file/fidonewakaxufi.pdfIn PDF document text
    • http://hoclaixebinhthuan.com/upload/contentFile/file/zorubetadolariwizilolaza.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/a0ece798c5eee684086a4e90eb667f91/17854752096.pdfIn PDF document text
    • http://teakdeck.pl/files/file/ladaref.pdfIn PDF document text
    • https://rlmahtani.com/userfiles/files/66833378035.pdfIn PDF document text
    • http://chronicles.ae/userfiles/files/bimivagebimaruxokevebi.pdfIn PDF document text
    • http://younewstoday.com/task/userimages/file/70887821960.pdfIn PDF document text
    • http://djarkitek.com/temp/vinney/HTML/userfiles/file/sigolemegusagumiliwegaj.pdfIn PDF document text
    • https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/kqehbrl1nakv3rc966qnou6vrq/mojamag.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/a633b967110668ec52ee746361e3c0c3/50946034990.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607255ffdeb38---jufimevatejas.pdfIn PDF document text
    • http://derma-dts.de/files/file/xokunexufofexenozebogagi.pdfIn PDF document text
    • http://www.expertnutritionadvisor.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608483a66714a---magosirudaxutoxuruj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=irregular+verbs+list+for+6th+grade+4+pdfPDF 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_off0000d732.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD732 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF44 17032 bytes
SHA-256: ec23df45b9e6f500eebff46296955f2dfae5d4844dcf45e8daf3a3118e83f315
font_02_sfnt_off00011aa5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AA5 11176 bytes
SHA-256: 356de160e1101e9217d9d242cea065889f274f77b21b2bc4f531835c6be0e56e

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