Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eb022a215cff6c2…

MALICIOUS

PDF

78.0 KB Created: 2021-07-31 14:30:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 6dd883881b66291920d9c3c0eca3d64b SHA-1: 7d530b70ae9a20b62d1d0c8f5cdc7371e5b13797 SHA-256: 1eb022a215cff6c2b28463df43f127c9b0125ebd33950a28173ccfb913adfd46
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to distribute malicious content. ClamAV and ML classifiers flagged this file as malicious, specifically as a phishing trojan. The presence of external URI heuristics and link farm indicators strongly suggests the PDF's purpose is to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/f6135ddbed4ec252141159b1cd93ab89/62716508415.pdf In PDF document text
    • http://ahkjt.com/upfile/file/jubowijuxazasefunumake.pdfIn PDF document text
    • http://n2nlah.org/UserFiles/file/puwulagazuvuwokuzipi.pdfIn PDF document text
    • https://www.medicalart.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1607790167169b---65842147124.pdfIn PDF document text
    • http://gomientrung.vn/uploads/image/files/sesinadawenozulezataran.pdfIn PDF document text
    • https://rubin2000-distribuitorshop.ro/userfiles/file/52801434465.pdfIn PDF document text
    • http://thanhlamresort.vn/wp-content/plugins/formcraft/file-upload/server/content/files/160b5c9e0029f6---tufiwolotuziman.pdfIn PDF document text
    • https://www.aceitedeoliva.com/wp-content/plugins/super-forms/uploads/php/files/b732ff67f67a421dc892dc32949c584c/21416508537.pdfIn PDF document text
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609335b1665a7---53914944080.pdfIn PDF document text
    • http://ajtoablakcentrum.com/_user/file/jojelarejizova.pdfIn PDF document text
    • http://vendingchat.ru/uploads/ckfinder/files/rasejamun.pdfIn PDF document text
    • http://www.tenniscanberra.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160817873cbaeb---xakuzikufejuporinin.pdfIn PDF document text
    • http://moiarchitekci.pl/pliki/file/pukajosesikuxikevi.pdfIn PDF document text
    • http://nhuaduongnhapkhauaz.org/upload/files/45931632840.pdfIn PDF document text
    • http://xn----ctbguteehkho5h.xn--p1ai/ckfinder/userfiles/files/93941834662.pdfIn PDF document text
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160fa0b0d0d90e---zozogunoxusadikizinofapu.pdfIn PDF document text
    • http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607af618ea184---padedusasuzaxawago.pdfIn PDF document text
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/k2qrboiq38ur22avh6ths4hap1/kuwid.pdfIn PDF document text
    • https://alajuusa.eemedia/contents/file/karetajizuvoxet.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607167ed53fe8---64286818523.pdfIn PDF document text
    • http://simpelms.nl/userfiles//files/lowuxame.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=how+to+find+completing+square+methodPDF 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_off0000cc2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e43e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43E 16872 bytes
SHA-256: b36a6f5611b6e2e8206fade2e4dc20595a3f2f1c0e810af35728be3e80821e98
font_02_sfnt_off00011058.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11058 11392 bytes
SHA-256: ecf567f7f9b18b7d1b26537581033cbdfbd7d1d1c27b38bc1878e197abb474c4

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