Malicious PDF — malware analysis report

Static analysis result for SHA-256 7df20adb27e424bd…

MALICIOUS

PDF

83.9 KB Created: 2021-09-23 16:47:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9f4b81f49ed401f805701ec9a31b3c45 SHA-1: f3bf003821fc1ec0b8223e6ea37563426c7ef238 SHA-256: 7df20adb27e424bd9f9710d93cd59250cf8c0ca935f04ceb2e0ce5a4afedc390
156 Risk Score

Malware Insights

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

The PDF was flagged by ClamAV and an ML classifier as malicious. It contains numerous embedded URLs, many of which point to compromised CMS upload directories or are hosted on disposable domains, indicating a link farm designed to lure users to malicious content. The document body is unreadable, but the heuristic findings strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://kingsap.com/file_media/file_image/file/misiminaxakiredanibodivex.pdf In PDF document text
    • http://vinabomi.com/uploads/userfiles/file/zetifufuvoxajaxej.pdfIn PDF document text
    • https://tourpon.kr/FileData/ckfinder/files/20210905_7C71ED17890F72CE.pdfIn PDF document text
    • https://namdolove.com/FileData/ckfinder/files/20210916_AEB6ABEBC02A0CD7.pdfIn PDF document text
    • https://nucamsa.es/userfiles/files/lefasegamefiliwa.pdfIn PDF document text
    • https://eminentland.com/admin/userfiles/files/ravoj.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16148068b8c64b---98877580611.pdfIn PDF document text
    • http://getsolarny.com/userfiles/file/wegizede.pdfIn PDF document text
    • http://ntweac.edu.hk/admin/ckfinder/userfiles/files/morajugujubuze.pdfIn PDF document text
    • http://fmdscu.net/userfiles/file/towopil.pdfIn PDF document text
    • http://sdtr.mdrap.ro/fckeditor/uploads/file/zepizekorezimemu.pdfIn PDF document text
    • https://dienhoanghean.com/upload/ck/files/sijasini.pdfIn PDF document text
    • http://irvine.songhakbbq.com/uploads/files/megazelazobawurewos.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/78295cf03c0214b2766a0a12f438965b/nenijasenomerid.pdfIn PDF document text
    • https://truongthanhco.vn/webroot/img/files/zudejejawinitu.pdfIn PDF document text
    • http://gccde.com/downloads/blog/geust/files/21919848786.pdfIn PDF document text
    • https://manhalhealing.com/userfiles/file/woruvosegapedigotupis.pdfIn PDF document text
    • http://hydrem.ru/images/file/xemajole.pdfIn PDF document text
    • http://conniecorsentino.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/fasopikakulanaxen.pdfIn PDF document text
    • https://tavfelugyelet.megujuloenergiapark.hu/admin/ckfinder/userfiles/files/87483788301.pdfIn PDF document text
    • https://dcimx.com/files/gedarugesarotanotuz.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/s1p4jald30bkfedmqj6gb6a786/nidixizivefafopexubabeni.pdfIn PDF document text
    • http://king-tableware.com/uploads/files/202109191059528743.pdfIn PDF document text
    • https://groupburuemas1.com/contents/files/nopodiba.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/161434dbcbcea9---sakajufigonaxolasa.pdfIn PDF document text
    • https://needlugs.com/userfiles/files/madetavekoteso.pdfIn PDF document text
    • https://sapporomn.com/userfiles/files/9126032184.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=mi+10+lite+5g+antutu+benchmarkPDF 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_off0000df06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF06 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f71d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF71D 11024 bytes
SHA-256: f925dceec8c497360bae2c58909d3b36833a64822baa1905ade20516378f46ea
font_02_sfnt_off00011094.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11094 18880 bytes
SHA-256: fa8bf68b470d70784c1f81be0354596e07e0581125c511a7c8456be6e1b73799

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