Malicious PDF — malware analysis report

Static analysis result for SHA-256 a60b5d73d6cc4c3e…

MALICIOUS

PDF

86.0 KB Created: 2021-07-25 21:45:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-16
MD5: 47ea790dc680aadfa9d054a05b35564f SHA-1: a5793e821ff4cd480c3f7d50bb1f05f75442f1f3 SHA-256: a60b5d73d6cc4c3e16bbc63477297a23afb303ce3f47df5a8d817333186282d2
156 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload directories and other unknown hosts. This pattern is commonly used for phishing or distributing further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://www.verpoort-bouw.be/wp-content/plugins/formcraft/file-upload/server/content/files/160942b5ce2e99---nolibuvizisekamowuxepak.pdf In PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16096bbfc49662---bopeliwikigepetefasizule.pdfIn PDF document text
    • http://myqself.com/upload/files/pazewigadevug.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608749a042b1f---58449826039.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/57406107523.pdfIn PDF document text
    • https://ibliberia.com/ckfinder/userfiles/files/rikivi.pdfIn PDF document text
    • http://boilerservis.ru/uploads/files/sugumebufasujutawodufog.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a14ce627888---35307913510.pdfIn PDF document text
    • https://webmenuplus.com/images/file/gafovirikigewiwetodelan.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/733f8a1efc34e4cfb7171d6544eba074/48749849888.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d985e4eb76---53019514142.pdfIn PDF document text
    • https://vietfun.com.vn/wp-content/plugins/super-forms/uploads/php/files/pqnavdri7546smsmehu8coit8q/78810319902.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cec523f858---jikoxugam.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c79128bab76---49605174679.pdfIn PDF document text
    • https://www.baileysmilk.com/wp-content/plugins/super-forms/uploads/php/files/b0439f4255841edf0f708de8bddaba7f/67569784630.pdfIn PDF document text
    • http://sieuthibongda.net/ckfinder/userfiles/files/suvabaziza.pdfIn PDF document text
    • https://www.swx.global/wp-content/plugins/super-forms/uploads/php/files/7b99cdac81c02ed3219ef9f9fab26a5f/71976188862.pdfIn PDF document text
    • https://yuktiedu.com/wp-content/plugins/super-forms/uploads/php/files/ce4d46ab2aee53da5fbf83b17537132c/53429334911.pdfIn PDF document text
    • http://chiesamadremarsala.eu/userfiles/files/kikulala.pdfIn PDF document text
    • https://www.skyline-recruiting.com/wp-content/plugins/super-forms/uploads/php/files/a47b7673bef7f727962d74edf5a61984/201319305.pdfIn PDF document text
    • http://nnk.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160c94474743f7---nabawiwukaju.pdfIn PDF document text
    • http://zge-led.com/luodan/images/userfiles/file/fopoxijomuzukajubabonu.pdfIn PDF document text
    • https://tecsal.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d110c85908---mezovozilizo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=echo+cs+400+max+bar+lengthPDF 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_off0000ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE36 11008 bytes
SHA-256: 8d685d863550327d3cef8d92a77fa4f6d002e6e5622f31784ac6ad494f928545
font_01_sfnt_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011fc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11FC7 16556 bytes
SHA-256: 5347967eb7c1b80453469faae7059febe21dbd2f4441e4f59facfdae699713c8

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