Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6bf382533d17225…

MALICIOUS

PDF

85.5 KB Created: 2021-07-01 13:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 71d3ccd264ce2bd1116b6ad20279a9b8 SHA-1: 8105d570c3507e724ab7a47a433cd8d435bbfa6a SHA-256: f6bf382533d1722575cdf3f9fc59afaf87e106490b6c019409a785b2cb20685b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a large number of embedded URLs, many of which point to compromised WordPress upload directories, suggesting a link farm designed to redirect users to malicious sites. The presence of these links and the overall structure indicate an attempt to distribute malware or conduct phishing attacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/e87d3d54ee58a9cda372256c6b5efdef/xusugedaru.pdf In PDF document text
    • http://svenstavik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd37bda2ca3---segalawa.pdfIn PDF document text
    • http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608903d6a03ed---5814410771.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/61647158968.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c017ceb51e4---bulosi.pdfIn PDF document text
    • http://fresh-j.info/images/uploadedimages/file/20995372999.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/vhv17hfvccg6j6m9nrs811oh9a/bopizelanularebivokonel.pdfIn PDF document text
    • http://lifestyleufa.ru/wp-content/plugins/super-forms/uploads/php/files/d5184b6c51719ebe74fc93c78c9efa4e/jofenipegejefujom.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/ae153d53b99dd675cb7622137ee4027e/xuzupelukowusafafow.pdfIn PDF document text
    • https://smarttactic.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed7ca524d3---lujebupizesurulebewadevaj.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/30129256521.pdfIn PDF document text
    • https://www.plsok.com/wp-content/plugins/super-forms/uploads/php/files/dc511f926a4a10f61db51d11cf020b24/51726288256.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/1420936c9cae340d3e5c773ea5e8b689/kilidepaniguj.pdfIn PDF document text
    • https://campermagazine.tv/public/file/38111424365.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847e2966ee4---32414036598.pdfIn PDF document text
    • https://marosme.ro/hirek/file/mekelejoxelafe.pdfIn PDF document text
    • https://die-elke.de/cms/elke_page_files/file/75075457295.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/53c714b4aabbcab4e833dfd6f2d4defb/gixisodesidekedogo.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/739b3560ff4cf3f0e242427e4bff45ad/mutajerixudopodoxapowuta.pdfIn PDF document text
    • http://goref.ru/files/file/55794182783.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16099559024d70---33908103360.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083807d4c870---66959773214.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=first+apology+of+justin+martyr+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_off0000ea1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA1A 17692 bytes
SHA-256: f0fe0ae13cbb30975c4db2adb9f713a805ae43d62197c224bb18073004c60973
font_01_sfnt_off0001179e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1179E 11028 bytes
SHA-256: c4b5ae6bfae6369a5e17bee308b63880d8220eb82f609504fa92be8235809b60
font_02_sfnt_off00013102.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13102 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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