Malicious PDF — malware analysis report

Static analysis result for SHA-256 e059fa04e3145501…

MALICIOUS

PDF

83.2 KB Created: 2021-07-13 02:50:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7a5b634ec558bdafe87c03f002d82edb SHA-1: 54faa840aa2aeceb10b971ddca1c40b40bf999ae SHA-256: e059fa04e3145501730eccf35e3302c7734bc15fc88470a7b6c78e8ba0cb7765
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, directing users to numerous external URLs hosted on potentially compromised or disposable domains. The presence of embedded URLs and the nature of the link farm suggest an attempt to distribute phishing content or download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://krisoc.ru/uplcv?utm_term=margin+for+intraday PDF link annotation
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/1c1c6de95079c06391421dcca063ff63/9840142272.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/24388686719.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/52503be0305dce07a54d41d64582b9d3/28511194411.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160915a5ec153e---20581959114.pdfIn PDF document text
    • https://personnelcle.com/userfiles/file/rasumubil.pdfIn PDF document text
    • https://fzclicks.com/demo/files/editor/file/lorewemufol.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/gofipotu.pdfIn PDF document text
    • http://www.companyforte.com/imagenes/editor/file/kagelebexunejonofuf.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c162cee5453---16757078784.pdfIn PDF document text
    • http://abnicum.com/files/file/95830158647.pdfIn PDF document text
    • http://bartuceviri.com/userfiles/file/99866002345.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/kajedazepi.pdfIn PDF document text
    • https://nmg.lv/img/uploads/files/23962471510.pdfIn PDF document text
    • https://ntiverification.com/userfiles/file/22573079142.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609815fc68677---8159779746.pdfIn PDF document text
    • http://szpk.hu/_user/file/tezobatulitozaxovade.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/18504077820.pdfIn PDF document text
    • http://wolfroccatiassociati.it/userfiles/files/zaverutosuvelerogizin.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160753ee1e7a8a---kofuxasofaxesimadosama.pdfIn PDF document text
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/160cc5fa9d0320---98489100434.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607126bdb319a---tosazukuwolugijo.pdfIn PDF document text
    • http://piri-piri.pl/ckfinder/userfiles/files/ripoxasufo.pdfIn PDF document text
    • http://www.marsagri.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbb60bc3cd8---49731832634.pdfIn PDF document text
    • 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_off0000e2fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FA 17816 bytes
SHA-256: 330c07e3ffe28502788792cbb3e0318e31ae27c88cf8638b7ecd7bda759779b2
font_01_sfnt_off000110c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000128df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128DF 10288 bytes
SHA-256: e035d67660e58b8e76006defea4b2a57e705f8e933844a9b6e87115307711975

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