Malicious PDF — malware analysis report

Static analysis result for SHA-256 68a50ede27da00b3…

MALICIOUS

PDF

74.3 KB Created: 2021-09-16 22:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 19863cf43abd22a243bffe1eaeeb1a87 SHA-1: 261ea13aecd7517a70affaa7f5972568aa1f5acf SHA-256: 68a50ede27da00b3312998063372c9c4908fc37e9e2fc3ea66a47ab8ccc4f213
156 Risk Score

Malware Insights

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

The PDF file contains a link farm, directing users to multiple URLs hosted on compromised websites, likely for phishing or malware distribution. Heuristics indicate it's a link farm on disposable hosting, and ClamAV detected it as a phishing trojan. The ML classifier also strongly flagged it as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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 http://ambiance-cinema.fr/wp-content/plugins/super-forms/uploads/php/files/5712da7f1b7494a89545eb46425c3bfd/lafevelazelajidizijitoje.pdf In PDF document text
    • http://romento.com/uploaded_files/userfiles/files/94576991458.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/72039689228.pdfIn PDF document text
    • https://iwanbim.iwan.co/userfiles/files/20597033644.pdfIn PDF document text
    • http://www.c-l-r-p.com/admin/ckfinder/userfiles/files/jomuvixemipebexadavodelo.pdfIn PDF document text
    • http://jiab.net/userData/board/file/pekivoveviwikabegupebesas.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/55208142212.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/35ae4113d1c2ef33454bf7e030506c00/73300866984.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/60665159234.pdfIn PDF document text
    • http://yasairamenbar.com/uploads/files/28853703583.pdfIn PDF document text
    • http://24horasnoar.com.br/ckfinder/userfiles/files/mederogikojejijod.pdfIn PDF document text
    • https://akvaguru.hu/user/file/38667593270.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/62594789462.pdfIn PDF document text
    • https://fsbulletsandbrass.com/userfiles/files/35495049988.pdfIn PDF document text
    • http://hdurmuslar.com/images_upload/files/nizalafebomeligadula.pdfIn PDF document text
    • https://optical-axis.com/uploads/files/202109020520076704.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/10365417527.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/fuzenobemereguxa.pdfIn PDF document text
    • https://wintechindia.in/ckfinder/userfiles/files/35548734722.pdfIn PDF document text
    • http://www.chp.pl/ckfinder/userfiles/files/42997824822.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161412393cb724---78485362646.pdfIn PDF document text
    • http://855solution.com/htdocs/cljr/data/files/fideboleravajoxuvukubuw.pdfIn PDF document text
    • http://photo-preiss.com/upload_files/files/86948207036.pdfIn PDF document text
    • http://clinicaveterinariacene.com/userfiles/files/zugiramudijiwulewa.pdfIn PDF document text
    • http://budohurtsa.pl/userfiles/file/wesaxavasub.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=vidmate+download+apps+old+version+for+androidPDF 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_off0000be0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0A 17124 bytes
SHA-256: 0ec9ae283b183aa37039afb51d96c5957a919b5e0283cfa95132b64f403bac87
font_01_sfnt_off0000eaa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEAA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000102b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102B8 10780 bytes
SHA-256: 74612797f925e258b92f4faaa09f2559425170dd793c2a4edd1528f1756d4528