Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b2940166bd19353…

MALICIOUS

PDF

123.0 KB Created: 2021-06-29 11:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: d66cb99a338e28251c096f1a82d7bb35 SHA-1: f954c52456602cba360b9dfb7312d036d1faf2f1 SHA-256: 0b2940166bd1935385d9fd37c0cbabe27ca7e7adf543ccb5904cefa18bf9f5d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classifiers also flagged it as malicious. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics further supports the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://wastran.ru/uplcv?utm_term=digestive+system+diagram+class+10 PDF link annotation
    • https://rkdestate.com/userfiles/file/disikilovifidiwusoz.pdfIn PDF document text
    • http://aldo-ins.com/userfiles/file/44604500157.pdfIn PDF document text
    • https://castilloexterior.org/ckfinder/userfiles/files/sakanubipororuwuxa.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/99303410798.pdfIn PDF document text
    • https://luxartparquet.com/wp-content/plugins/super-forms/uploads/php/files/e6de94078401d2eae62397275463fa0a/46114571099.pdfIn PDF document text
    • http://kammatrans.com/userfiles/files/3576122413.pdfIn PDF document text
    • https://hssipm.com/wp-content/plugins/super-forms/uploads/php/files/8502b9a085dbbd0d0d6e0cf228c20432/joladaribimusebu.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/82757337343.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/b4f21a60cdd1f212113325a85c02f5cc/82425179408.pdfIn PDF document text
    • http://alexhofford.com/temp/files/file/mosokosiwajepogu.pdfIn PDF document text
    • https://topinsolventa.ro/userfiles/file/24878257780.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/160cc1c60eeea6---rudiniwatakapokipa.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607fc816da3f2---taluzawadamajafojetuzusok.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/48db2f673102621f9a5cf9366b703c33/41109694021.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aff49ea99e9---rozujoxenumafulixajog.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1606f00ed9bd05---dobitajagivapekoziwugu.pdfIn PDF document text
    • http://wchs65.org/clients/b/bb/bb65574a37642f7fe3135935df861e67/File/54211966365.pdfIn PDF document text
    • http://files.ibiza-ferien.de/file/tobolulofadodelu.pdfIn PDF document text
    • http://studiotecnicopinto.it/userfiles/files/nigumuzite.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160877b704c90c---fopobufob.pdfIn PDF document text
    • http://mfcwestenkwartier.nl/beta/userfiles/file/66814629162.pdfIn PDF document text
    • http://st-communications.com/ckfinder/userfiles/files/15429827465.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_off00017d10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D10 10844 bytes
SHA-256: 63a8cce937ae972fe389abbba7481e33b96c5fc7cd916387589eaf93a1436205
font_01_sfnt_off00019608.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19608 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001ae1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AE1A 17816 bytes
SHA-256: f10f7ec1e28ada2f288c383f785ba54c0b6b8c28eae46a7f6b2b8798eef731e2

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