Malicious PDF — malware analysis report

Static analysis result for SHA-256 bbc354eca3b0e8ab…

MALICIOUS

PDF

83.1 KB Created: 2021-09-07 09:21:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: b47298e18afa397c320a6b1e0aa4b9dd SHA-1: 4e0b17c860201eba17704050416e084d323bcc5a SHA-256: bbc354eca3b0e8ab3018ef8d96dcc6170f008e7a8a8f756dcd5ded32b20339ce
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The document functions as a link farm, containing numerous URLs that point to various websites, including those hosted on compromised CMS uploads. This pattern is commonly used to distribute phishing content or redirect users to exploit kits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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 http://allnatureint.com/userfiles/file/58045834347.pdf In PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca5c15ebb3---rakikila.pdfIn PDF document text
    • https://www.chablis-gautherin.com/ckfinder/userfiles/files/xerunorazikojefuvodidamil.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072c17f4b0a6---70458364902.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c228c8a4b18---75452474694.pdfIn PDF document text
    • https://thuaphatlaihoanghuy.com/uploads/files/xofapitidu.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a3b7edd406e---xitubigiw.pdfIn PDF document text
    • https://atphp.ch/userfiles/file/50557601878.pdfIn PDF document text
    • https://sgpropertylawyers.com/wp-content/plugins/super-forms/uploads/php/files/02c46104449faab8eff69fcd88dc2e77/96678510119.pdfIn PDF document text
    • http://azseal.net/uploads/userfiles/file/20421983734.pdfIn PDF document text
    • https://christembassyromford.org/wp-content/plugins/super-forms/uploads/php/files/69137b31cc2f4976894f1adbb2689754/xejinaxu.pdfIn PDF document text
    • https://karapinarinsaat.net/userfiles/upload/file/gupabuxezipobogafubow.pdfIn PDF document text
    • http://gtlfuelmarine.com/userfiles/file/89417009332.pdfIn PDF document text
    • https://marjoyunlar.com/calisma2/files/uploads/naguluze.pdfIn PDF document text
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e2ade3ee7---1244113780.pdfIn PDF document text
    • https://www.nrlandscapes.co.uk/wp-content/plugins/super-forms/uploads/php/files/4f99a767c9a31558e97982571a676804/soveb.pdfIn PDF document text
    • http://simonide.org/userfiles/file/gurerogomujekopojojulekud.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/f2b3a07a1dcad4665799d1690bb7b6f1/vebejuzorevuwomafobi.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efe42f9891e---nedezudofasada.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/acc91f2ba2ab639363f1f5a4332a3d4c/84859128671.pdfIn PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/jajumorumido.pdfIn PDF document text
    • https://airflow-skateboards.com/upload/file/tegixudobababodas.pdfIn PDF document text
    • http://sakem.org/userfiles/files/99035572851.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=modern+sliding+mode+control+theory+new+perspectives+and+applications+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_off0000da12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA12 11328 bytes
SHA-256: 5048d20700f35e91b463dffb81fde2b723992372c06762a7a0d08627d6b624b9
font_01_sfnt_off0000f462.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF462 19296 bytes
SHA-256: da02259501bfa153fa298c1bad8187da00b1252f4c1ba380b26dc8a0ac15aab0
font_02_sfnt_off0001261e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1261E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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