Malicious PDF — malware analysis report

Static analysis result for SHA-256 eceb14ee93f30a2f…

MALICIOUS

PDF

104.8 KB Created: 2021-06-26 09:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: e56c830ec6d68595c16c5e29605ccffa SHA-1: 0f58f11f7ef7c69de2972addf7b243f1866e7968 SHA-256: eceb14ee93f30a2f54c32d2aeb61c2c0eb2164361212d278bfc77d444268fcbe
156 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 that redirects to multiple domains, some of which are hosted on compromised CMS upload directories. The primary purpose appears to be phishing or directing users to malicious content through a series of redirects. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9926

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://etre-cheval.fr/Applications/MAMP/htdocs/etre%20cheval/news_pix/file/10300915814.pdf In PDF document text
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16087f554d5bfc---sijegon.pdfIn PDF document text
    • https://goactive.hu/wp-content/plugins/super-forms/uploads/php/files/2f022b1deeb44b6bc0cff32fc1e824e2/zilevojijawogajivej.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/0948e58f85c8148818d04c9b9a5a9cac/21535852622.pdfIn PDF document text
    • https://robert-zauer.cz/userfiles/file/fudifanegenusixod.pdfIn PDF document text
    • https://jclifeschools.org/wp-content/plugins/super-forms/uploads/php/files/180b7ed5703a651c2f7e9bc5f1346d24/totarovorinadivu.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a8640a83ce---46254658949.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/4ad5ed8fd5f4f0e4a479f07eff3b4014/xunalalane.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083270c25149---rabotixegisovikog.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608ff0888d897---5971734510.pdfIn PDF document text
    • http://bet-balance.com/userfiles/file/ranilavabasegiviso.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b40f70f33f---14785392619.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/mudodarojibesidasofud.pdfIn PDF document text
    • https://lostsoulsmemorialnj.org/wp-content/plugins/super-forms/uploads/php/files/cded44fdc025bdd1e0621285306425a5/gotowerugakexozemejudut.pdfIn PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac0b65d1a70---62011991113.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160a00c0e567e3---96408679765.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16091d11d854eb---zelekububakogodunabuxa.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/fexezaruverigofefo.pdfIn PDF document text
    • http://aeskulap24h.de/wp-content/plugins/formcraft/file-upload/server/content/files/160744421f0d31---16790275901.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/160896d9a5c7af---retezurodowusopipit.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608868800049d---tufulemojepibepifofi.pdfIn PDF document text
    • http://zonwering-belgie.com/ckfinder/userfiles/files/fofuwasoze.pdfIn PDF document text
    • http://sungsam.net/userData/board/file/95969598337.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/17790388211.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=famous+cavalier+king+charles+spanielsPDF 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_off000136ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x136AB 17508 bytes
SHA-256: 1abc2f3e0e3f76b97e164744af3efe311aac632ea101d772edcb81150ca0aefb
font_01_sfnt_off00016430.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16430 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00017c47.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17C47 10956 bytes
SHA-256: 7beec770264bf35450ec1b05281865648f18569eabdddb3d168acda2d900231e

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