Malicious PDF — malware analysis report

Static analysis result for SHA-256 94f0ede363eece4f…

MALICIOUS

PDF

68.9 KB Created: 2021-09-26 11:52:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 1e6fd11f83dcc125c36b213c16ae460a SHA-1: c8640c8579750e6e1a03ab9d04e3f9ddcdb182d7 SHA-256: 94f0ede363eece4ffebd6264be559a05544fcfafa98ba7facdcad595afe953e1
146 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF employs an image-only lure, a common tactic for phishing or malware delivery, as indicated by the PDF_IMAGE_LURE heuristic. It contains numerous external links, many hosted on disposable domains, suggesting a link farm used to obscure the final malicious destination. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving the distribution of a second-stage payload via the embedded URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://philabc.ru/uplcv?utm_term=watch+money+heist+season+3 PDF link annotation
    • http://theatergruppe-nestelbach.com/rogan/admin/fckeditor/bilder/file/zobakupigiviwimotikezim.pdfIn PDF document text
    • https://dutchhaves.com/uploads/files/202109241333545261.pdfIn PDF document text
    • http://studiotecnicobergamaschi.it/userfiles/files/tebejerozajekoxaw.pdfIn PDF document text
    • http://brcassociati.com/userfiles/files/62038080725.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/72349807694.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/vagororinetobotuzigadevet.pdfIn PDF document text
    • http://optometrystaprzemysl.pl/userfiles/file/regesatibajapobubilu.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/161497fd2ca6a3---85206966784.pdfIn PDF document text
    • http://ingore.cn/upload/files/50282700523.pdfIn PDF document text
    • https://mcq-exambd.bdbabymart.com/app/webroot/ckfinder/userfiles/files/82154718764.pdfIn PDF document text
    • http://eca.or.th/ckfinder/userfiles/files/kanebewokuranilibusirofi.pdfIn PDF document text
    • http://lso-msm.fr/userfiles/file/texebuzazojudesuxo.pdfIn PDF document text
    • https://iveducentar.com/uploads/assets/file/36373776717.pdfIn PDF document text
    • http://emannsltd.com/userfiles/13701280668.pdfIn PDF document text
    • http://topenglish.sk/app/webroot/gallery/files/nepex.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/21712146333.pdfIn PDF document text
    • https://yournew.site/wp-content/plugins/super-forms/uploads/php/files/p83jotndgv559ss11vr9267aga/folozivojegedaridakoxozog.pdfIn PDF document text
    • https://ice-group.pl/userfiles/file/zumekotuxuxurebarezug.pdfIn PDF document text
    • http://musiclivemarsala.com/userfiles/files/76407561118.pdfIn PDF document text
    • http://potlista.com/file/files/1336258863.pdfIn PDF document text
    • https://lesura.net/userfiles/file/devefixexobor.pdfIn PDF document text
    • http://orthodoxnews.us/file/60091321927.pdfIn PDF document text
    • http://falconfam.com/ckfinder/userfiles/files/lakaxonosezelizorefe.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_off0000b181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB181 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC998 10628 bytes
SHA-256: cbc4336aedd5b50263400937dff5df5fdac5de1f47c8e10cded0856bc3f2a1e1
font_02_sfnt_off0000e1d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1D4 14404 bytes
SHA-256: 9476f10e46bbbe120748ac16b5e25feb025fc3a28f5d200f0686438ce0b5f96c