Malicious PDF — malware analysis report

Static analysis result for SHA-256 a12e392a8fe93b40…

MALICIOUS

PDF

87.7 KB Created: 2021-07-03 00:46:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-15
MD5: 268d58baa26d1c77b7f49bd2d9a826a9 SHA-1: 97f358dbf1d9d6b67bf292256da12da766780ddc SHA-256: a12e392a8fe93b4087c3745cc8fd4512d07f71517ff0b618d0bc07861b0b701f
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ClamAV and an ML classifier. It contains a large number of embedded links, many pointing to compromised WordPress sites, suggesting a link farm or phishing lure. The primary goal appears to be directing users to external, potentially malicious, websites.

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://recruiters-zone.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609ed50d5f8e4---giribak.pdf In PDF document text
    • http://daugiavanthienphuoc.com/media/ftp/file/35318457119.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/59fd5ea41c4f945b49b654164513b2a4/26446565873.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/74724383405.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/63381740589.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609603a022f15---zigunoropuli.pdfIn PDF document text
    • http://www.deewanalarab.com/up_imgs/67296021906.pdfIn PDF document text
    • http://boeschfamilytravels.com/clients/43210/File/nenepibu.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/fa917a6e83571fc2d5e70b26ac473b4f/xugasebe.pdfIn PDF document text
    • http://stylekd.ru/files/65300711380.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/90e4c9d0b6879fb0738e40e237afbfef/fosiwikepigaribuxig.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/3e0419d392641fad92ad13d3269f6927/daxukapubipoxowapurag.pdfIn PDF document text
    • https://www.costaverde.it/wp-content/plugins/formcraft/file-upload/server/content/files/160712d5016802---munapubijusulologajeladi.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/l8ke4e81uibcd0626ugsrmptp1/tasefaduvupuwoxogenul.pdfIn PDF document text
    • http://vitali-schulz-eiskunstlaufen.de/userfiles/files/zunosida.pdfIn PDF document text
    • http://wbbray.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb1fa48c98---tiwuwakufukeximu.pdfIn PDF document text
    • https://fellowpeo.com/wp-content/plugins/super-forms/uploads/php/files/ddecd9c11ecd6852c87b2bf8ccdedb2a/jigulonu.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160931de714431---nufefenamovidufak.pdfIn PDF document text
    • https://mayurherbal.com/userfiles/file/21254300479.pdfIn PDF document text
    • http://bagandpack.ru/wp-content/plugins/super-forms/uploads/php/files/2fc28685dc4d45ee2123937497cc1d6c/waninanimukitedep.pdfIn PDF document text
    • http://praxis-greve-polley.de/web/editor/files/jidavobapox.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/ghlfls9rckh7qhbh5013l7mkkl/xowanilupen.pdfIn PDF document text
    • https://www.paparazzirestaurant.com.au/wp-content/plugins/super-forms/uploads/php/files/dd01f7d1fb64dab592789ef5e8d035a5/lubupelesozupazon.pdfIn PDF document text
    • https://blueridgelightingandcontrols.com/wp-content/plugins/super-forms/uploads/php/files/9367ccb3d4726e4e2e1729f7d32ebb4f/sorefikato.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3vuEKuznOb8/uplcv?utm_term=black+panther+full+hd+movie+downloadPDF 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_off0000f20b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF20B 11112 bytes
SHA-256: 1c46d5eb8838e14c76d0bb9d014e4ccd0082d40a5d235b48663aa27324ec2365
font_01_sfnt_off00010bdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BDB 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000123ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123ED 17448 bytes
SHA-256: d7ffca3695061936b34f6ec32c10dd2f92ca382e2cafae0b50c9b6fb6632fca5