Malicious PDF — malware analysis report

Static analysis result for SHA-256 897692fae02c50d8…

MALICIOUS

PDF

82.1 KB Created: 2021-09-22 21:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 36ead1aa1ccf241058a604f63db93326 SHA-1: bafd4ed4f45235d4ecf48e48be5123957d96e817 SHA-256: 897692fae02c50d833ec8cf72a582fe0c84b262dd27f9eca36bf42925ece5840
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan and an ML classifier with high confidence. It contains numerous embedded URLs, many of which point to potentially disposable domains, indicating a link farm or redirection scheme. The PDF structure and numerous external links suggest an attempt to direct users to malicious websites, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://bptramptour.pl/files/file/77490582476.pdf In PDF document text
    • http://ityab.com/cache/fck_files/file/tebimodir.pdfIn PDF document text
    • http://dd-eng.com/files/files/dojudabima.pdfIn PDF document text
    • https://kolodezrus.ru/wp-content/plugins/super-forms/uploads/php/files/b26e92a63e8cd9d318bbb3b144b9b2bb/pidedisa.pdfIn PDF document text
    • https://lajovisena.com/gallery/file/nulowapulujimipanuw.pdfIn PDF document text
    • http://aow.infogestnet.it/ckfinder/userfiles/files/witifevarakixomebemabitav.pdfIn PDF document text
    • http://naturalwonders.com/uploads/files/kujerafowisijogujojowef.pdfIn PDF document text
    • https://hearing-outlet.com/uploads/files/202109030950435028.pdfIn PDF document text
    • http://reflita.lt/uploads/files/kevumasepepuzuvevine.pdfIn PDF document text
    • http://coreaad.com/DreamDataUpload/file/92918435373.pdfIn PDF document text
    • http://colonia-hausmeister.de/uploads/files/mopetefozevukudiziderazil.pdfIn PDF document text
    • https://propactionvehiclesuk.tv/userfiles/files/22067287549.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/161385cd81e92e---zurite.pdfIn PDF document text
    • https://webaprint.be/img/file/lazaxomodulagekaradore.pdfIn PDF document text
    • http://brain-sh.tw/upload/file/53634510357.pdfIn PDF document text
    • http://faradtvandor.hu/picture/userfiles/file/xeruxavazikixizusawa.pdfIn PDF document text
    • http://sualpturizm.com/userfiles/file/32817270748.pdfIn PDF document text
    • http://mirutte.com/newsfiles/files/duvedosavolejegojebiwox.pdfIn PDF document text
    • http://studiofagiani.eu/userfiles/files/maraji.pdfIn PDF document text
    • https://bela.geekers.tw/upload/file_folder/file/45864963251.pdfIn PDF document text
    • https://penzehir.com/dorceiys/ckfinder/userfiles/files/bobowifupusas.pdfIn PDF document text
    • http://sabaparsian.com/ckeditor/files/files/76914430505.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/wamofimugis.pdfIn PDF document text
    • http://thegioichuyendong.info/app/webroot/upload/files/69343636577.pdfIn PDF document text
    • http://twtime.com/uploads/files/202109071056058325.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=how+to+export+csv+file+to+android+phonePDF 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_off0000d909.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD909 10964 bytes
SHA-256: 43c9f917427e17eeb5791a554a5b2f45564b2bcbf39a9fd44e2c71828e4623b6
font_01_sfnt_off0000f268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF268 18708 bytes
SHA-256: ef40fb015dc7c213df7d5483fa25f0295b104b69cc56cbc48b7967fa25e6fbd6
font_02_sfnt_off000122c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x122C8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1