Malicious PDF — malware analysis report

Static analysis result for SHA-256 90e9ce97229ed014…

MALICIOUS

PDF

83.9 KB Created: 2021-06-28 14:22:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 0d53a4d834057ce9098f3c8cdab04303 SHA-1: 4bc54bf0ef3985c9b3bbf0f53b4355566eabff2c SHA-256: 90e9ce97229ed01483216e36b3505cb66efa190fb535a01415477bda85f7ae3b
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to host malicious files. The presence of multiple PDF download links on these compromised sites indicates a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160782db3df422---raruruzor.pdf In PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/r66odi1qnak7o3ch7r500joe9m/serixalobi.pdfIn PDF document text
    • http://yogathoitrang.com/quangbasanpham/app/webroot/upload/image/files/getaritodegejizexeg.pdfIn PDF document text
    • https://youstore21.com/wp-content/plugins/super-forms/uploads/php/files/0f5aede3ba43ec1840b6a583259b56c5/tegosokunuguxu.pdfIn PDF document text
    • http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/160703c241cb22---92179741612.pdfIn PDF document text
    • https://asigurareingermania.ro/wp-content/plugins/super-forms/uploads/php/files/42i6c0qf8420vfmno98gesi3e2/xivajexalifapaz.pdfIn PDF document text
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/84727a755fd866e1c0143f227c436494/75099597095.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c087c015535---gifimadib.pdfIn PDF document text
    • http://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/9ae955361d81686201ecb3c2c657139d/44811497588.pdfIn PDF document text
    • http://dges.in/userfiles/file/85958295507.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094316b6d955---49121991531.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/115b5af7770f18c867e5d0063bb6a36d/tukipubimo.pdfIn PDF document text
    • https://gea99.com/ckfinder/userfiles/files/galaxuzagireluj.pdfIn PDF document text
    • https://tenfci.org/userfiles/file/bibitomidutipimunimadu.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb686bb0e63---56725633685.pdfIn PDF document text
    • http://pro-elec.ru/ckfinder/userfiles/files/54460586173.pdfIn PDF document text
    • http://bigsvatcharasith.com/userfiles/file/46664700626.pdfIn PDF document text
    • http://stsaischoolamritsar.com/slbdavbatala/userfiles/file/taxederoninisefepekupi.pdfIn PDF document text
    • http://liavanhaeringen.nl/userfiles/files/69778037879.pdfIn PDF document text
    • http://olddieselparts.com/ckfinder/userfiles/files/retukilaki.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/evc26lk8pjfu91qecvdnkoh89k/bemaxitewogijot.pdfIn PDF document text
    • http://rittenhousereunion.com/clients/a/ad/ad7d26974070b67854a29702aed78614/File/jevunefaza.pdfIn PDF document text
    • http://mamnonlittlesun.com/upload/files/bipokoviwadaxawe.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/160861c06df088---bikimewukereromusafelefok.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/rurigutop.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/o30if0p2q7ul0c31i4in3omufp/96586447027.pdfIn PDF document text
    • http://nandeestationery.com/userfiles/files/sokubukepufinuko.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=play+swords+and+sandals+3PDF 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_off0000e329.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE329 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB3B 18084 bytes
SHA-256: 697ea890d345b2520ca3a791fc0c0e908251b824c370ead58eaebda1bfb21461
font_02_sfnt_off00012afc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFC 10292 bytes
SHA-256: ee0564154be848ffc65382d4ee3c17d134382dc8d1cb6d5da72bcf1b6e828b21

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