Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbbed2c01eb957d5…

MALICIOUS

PDF

89.4 KB Created: 2021-07-14 06:42:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 3d166a6c5d40263a4fcf5fb49dea6d80 SHA-1: 24d18573b3e99ef8a3dcd575987601f53ff75580 SHA-256: fbbed2c01eb957d58b1ca4bd486d1fa1eb26940f58ae833e107219c723f7bda0
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for executing malicious code. It also features a link farm pointing to multiple distinct hosts, many of which appear to be compromised WordPress sites or disposable hosting, suggesting an attempt to obscure the final destination or distribute payloads. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://konditsionery-reutov.ru/upload_picture/file/vovadomi.pdf In PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b8113645f2c---bivizife.pdfIn PDF document text
    • http://ikuma-car.com/js/upload/files/jugogewezegifevozutuwosuw.pdfIn PDF document text
    • http://jingluo.net/uploadfiles/files/60515788456.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/07boii2d8pjm1et79boaiktqch/92074417245.pdfIn PDF document text
    • http://bigxra.com/uploadfile/file/2021052117421673499.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/39146555574.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/71755399228.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/zepanetowisibevazorefi.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/2672939006.pdfIn PDF document text
    • http://danchrisjewelry.com/userfiles/file/zavopumajedaxawegena.pdfIn PDF document text
    • https://messianic.live/wp-content/plugins/super-forms/uploads/php/files/c4a6aa2133330dbcaa15075c1dfee0a5/32002659579.pdfIn PDF document text
    • http://daehwa.info/uploaded/file/80762387785.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160ace9fe98c63---gexoz.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/56tqnik39tp6fajbcr7ej631ba/vegijuwiwam.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/3ca787975f6c7e84868462303023d77b/67747863075.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/00oo7l6j95sn0sm9jr214q33f6/zofadomekusek.pdfIn PDF document text
    • http://jinxinghotel.com/uploads/files/46471320456.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b044451aeed---gefagiguguzamedigiburip.pdfIn PDF document text
    • https://vishalahospitality.com/ckfinder/userfiles/files/86000532120.pdfIn PDF document text
    • https://nutricionintravenosa.com/wp-content/plugins/super-forms/uploads/php/files/f804e87567c5c0efb84d143ff547a7c9/37523093350.pdfIn PDF document text
    • http://chalappuram.com/userfiles/file/dasusibuvi.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/dasisizimanipunutofegosas.pdfIn PDF document text
    • https://manuscripthandler.com/userfiles/file/fariboredumidu.pdfIn PDF document text
    • http://www.aqsclimited.com/EditorImages/file/momolorobudimimefosovav.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=canning+pickled+turnipsPDF 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_off0000f543.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF543 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010d5a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D5A 10792 bytes
SHA-256: 2afc81ddbf0fef439638c313f39a8a9436445539c2c5f6414d6449f56d240ad8
font_02_sfnt_off00012627.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12627 18720 bytes
SHA-256: 3be32c4a9050b6fde0d4967199f890cdaceb4a7bf4cff56aca7c3d9badc84893

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