Malicious PDF — malware analysis report

Static analysis result for SHA-256 d87fa7597d800cb2…

MALICIOUS

PDF

176.4 KB Created: 2021-09-01 06:49:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: e29d8041ee4ce63febf3efb034f58c00 SHA-1: 9e28a60d70859b242ba8e9c2d8ac512339caa79a SHA-256: d87fa7597d800cb281b58ceca6894ce6a35bd4c812cb673e8e803c58db24535a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads, indicating a link farm or phishing attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/ni97r24lbiecnmbtcrcvfi3525/3223054221.pdf In PDF document text
    • https://www.grandiosa.is/wp-content/plugins/super-forms/uploads/php/files/vv84lkoc4cqjs5va2uja5i1jj0/67287905134.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082a986e8fdd---49856399372.pdfIn PDF document text
    • http://willbramephotography.com/52873074833.pdfIn PDF document text
    • http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/144b651dac69978e7c9e9378a7099cf4/merulafijobobarexid.pdfIn PDF document text
    • http://ekbdrive.ru/ckfinder/userfiles/files/pisigup.pdfIn PDF document text
    • https://www.beachesbrewing.com/wp-content/plugins/super-forms/uploads/php/files/b4b795c95cdc1bacc763d4dead8b5860/jujijepuwosejizegerafu.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/a2400cbdacc7e01486db7e6bd2918e10/41846875443.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/d8gj1uftk32o7tb5h8ptl2m8g4/42554959554.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/33939817265.pdfIn PDF document text
    • https://www.electriclighting.com/wp-content/plugins/super-forms/uploads/php/files/ce7a37e1b853a228b19c14f8450bb25f/lenaxiwibaroxobetekoso.pdfIn PDF document text
    • http://www.xpresswedding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbfdac40fdb---40742030148.pdfIn PDF document text
    • https://www.latentoac.com/portal/wp-content/plugins/super-forms/uploads/php/files/fb6u4r0fa7h7j21cukni5smngu/71235881771.pdfIn PDF document text
    • http://associatedreclaimed.reclaimedoils.com/userfiles/files/kejaruluzakusapubeviruve.pdfIn PDF document text
    • http://nacyc.jp/Upload/file/34780177500.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/3d33bfu2irb85tib0fqvjku84i/zakoturavenexubafosadaduw.pdfIn PDF document text
    • https://www.crossfitparamaribo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a50344780e1---wasowupazolufobiwavimalo.pdfIn PDF document text
    • http://comlark.ru/userfiles/files/94507077330.pdfIn PDF document text
    • https://zzhqhi.com/d/files/diwaluse.pdfIn PDF document text
    • http://ingegnasrl.com/userfiles/files/70589626277.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16126cf3806b3b---15446758603.pdfIn PDF document text
    • https://avenue102.com/uploads/file/73724163736.pdfIn PDF document text
    • https://kede.org/userfiles/file/dosugegadukulajuwurem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=calculus+11th+edition+solutionPDF 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_off00024976.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x24976 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002618d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2618D 10552 bytes
SHA-256: 4414ba1dd3a4d9acb7df940b992cc305907fa524c427d6440e9504de7288eb08
font_02_sfnt_off00027997.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27997 22256 bytes
SHA-256: 48996ed5692afcbe276a48af4eab19a95ac30cd418901720405ef1343ed296d9

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