Malicious PDF — malware analysis report

Static analysis result for SHA-256 edaf00c8f3f2e005…

MALICIOUS

PDF

79.0 KB Created: 2021-09-19 11:20:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 8eab8466c82183992d514449c11194e4 SHA-1: 56ddc3cf593700cec0341870863b509a081b4f63 SHA-256: edaf00c8f3f2e005f9ff02f7802ae7da57bf6a42ea4a13c6798cf10d589b4822
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. The document contains a link farm pointing to various PDF files hosted on compromised WordPress sites and disposable domains, suggesting an attempt to distribute malicious content or host phishing pages. The 'SE_CALLBACK_LURE' heuristic indicates the document likely prompts the user to call a phone number, a common tactic in tech-support scams or callback phishing schemes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 7

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/27084b976c0bade53765bff67f7520d0/50184196076.pdf In PDF document text
    • http://business-plan-capalpha.eu/mbp/upload/images/images/upload/ckfinder/genekefuwabi.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e57289ddac---majafojodi.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16146ab119fa99---todetenalinuza.pdfIn PDF document text
    • https://democv.associasuite.com/imagenes/contenidos/files/fogemujoxofinemul.pdfIn PDF document text
    • http://balletpanov.com/uploads/files/nekojozilunupij.pdfIn PDF document text
    • http://portaldeaquidauana.com.br/ckfinder/userfiles/files/denuwekubiviwuzuja.pdfIn PDF document text
    • http://steakpluspizza.us/userfiles/file/12600512270.pdfIn PDF document text
    • http://imssp.by/data/images/fxeditor/file/41935322617.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/vipemudaw.pdfIn PDF document text
    • https://www.twibiotech.com/plugin/ce1/ckfinder/userfiles/files/3504772268.pdfIn PDF document text
    • http://vonschickenfremont.com/uploads/files/21208988738.pdfIn PDF document text
    • http://liga-stf.ru/i/upload/files/11493808731.pdfIn PDF document text
    • http://pierrevillers.fr/mairie_files/file/daxevi.pdfIn PDF document text
    • https://cmf8.ir/data/file/13944806975.pdfIn PDF document text
    • http://dierenwinkelindex.nl/images/uploads/15831492387.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/kkfeobocklgr4imhsbe5morco1/83720573351.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b1aad7e87a---70750877281.pdfIn PDF document text
    • http://www.lbf-cosmetics.com/website/wp-content/plugins/formcraft/file-upload/server/content/files/161462f0ed6885---bupubosilatumipazaferagal.pdfIn PDF document text
    • http://sipzip.com/userfiles/file/83046312897.pdfIn PDF document text
    • https://ecosolar-energy.com/piceditor/file/dasexukobitu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=redmi+note+9+mi+account+remove+filePDF 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_off0000cee9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEE9 17796 bytes
SHA-256: 782c3bdbb473a43f803081a017782ddbd424ff7aa46633717efe9eab4165d3b9
font_01_sfnt_off0000fd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD23 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001153a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1153A 10848 bytes
SHA-256: 677c38e8087ab3d48e9bda1eee435abf35f197a24d917ab87731533aa5c14761

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