Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb44a8e76797396…

MALICIOUS

PDF

80.8 KB Created: 2021-09-19 04:00:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 08a3d8e86988f3a664a42a3e92a701d3 SHA-1: de89a402e4f39be537d39b68d7250b9bdbb866f5 SHA-256: 0eb44a8e76797396d1a7d5e8d02bcba9e89cfc8a1c10f9fd3807bc32b0b89068
164 Risk Score

Malware Insights

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

The PDF file contains numerous links to compromised websites, many of which host further PDF files. The presence of a 'download button' heuristic and the ML classifier's high confidence score indicate a malicious intent to trick the user into downloading a payload. The ClamAV detection further confirms its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://allytemp.ru/uplcv?utm_term=call+of+duty+apk+garena PDF link annotation
    • https://elitestrategyglobal.com/wp-content/plugins/super-forms/uploads/php/files/0824b5cb40893339bd8aedc70afc7bb4/97855698943.pdfIn PDF document text
    • http://businessplan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/valetokamowiveli.pdfIn PDF document text
    • http://kazuma.ru/ckfinder/userfiles/files/tisupikasepesogomu.pdfIn PDF document text
    • http://szjglaw.com/uploadfile/file/2021090105153673499.pdfIn PDF document text
    • https://www.dyna-tech.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613674ce30669---rigunekobo.pdfIn PDF document text
    • http://p-jtech.com/userData/board/file/5799825447.pdfIn PDF document text
    • http://www.fishandcosolicitors.com/uploads/files/79758797164.pdfIn PDF document text
    • http://kleinschaden.expert/userfiles/file/33454175442.pdfIn PDF document text
    • https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/6266a6dab15a9e290c9e608cf50903f2/luxade.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed8fea1ee6---63098075153.pdfIn PDF document text
    • https://haciendaloscipreses.cl/upload/file/75163264881.pdfIn PDF document text
    • https://bartonsteel.com/tony/barton/ckfinder/userfiles/files/xulame.pdfIn PDF document text
    • http://phuquytravel.com/nguyenvanlinh/files/71144365485.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/79362239868.pdfIn PDF document text
    • https://rivieresoceanie.com/ckfinder/userfiles/files/37013735917.pdfIn PDF document text
    • https://sitpchemcieszyn.pl/_sitpchem/file/72280660691.pdfIn PDF document text
    • http://inspiredindianfoundation.org/uploads/kabutosawifepip.pdfIn PDF document text
    • http://rasciindia.com/firetech/ckupload/files/78310000180.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/f0ea026cde5baf23503fc4d0b4beeb1c/39494046117.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/zodufumujobujovalomodu.pdfIn PDF document text
    • http://propertiesforrent.com/userfiles/file///40743020704.pdfIn PDF document text
    • http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161386aaa1ab57---48377989233.pdfIn PDF document text
    • http://thietbiantoanttk.com/uploads/files/52058873393.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/87624599628.pdfIn PDF document text
    • http://debandhelder.nl/ckfinder/userfiles/files/25843104492.pdfIn PDF document text
    • 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_off0000d217.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD217 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ea2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2E 10748 bytes
SHA-256: 432c965d71188f7f5b60d7c323e8dc90f5f135e1bea0774415595d4ded10cb37
font_02_sfnt_off000102e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102E9 19344 bytes
SHA-256: 49503efb9c5c10ca84ddbd44508f24941b94494ab898f00ba8ff98392f6c9f94

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