Malicious PDF — malware analysis report

Static analysis result for SHA-256 216c56e1675d77fe…

MALICIOUS

PDF

141.5 KB Created: 2021-07-22 21:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2aa2be1913319efa80a700d803cbe443 SHA-1: faf819692c80b4f9c15e80920680f2ae524d3764 SHA-256: 216c56e1675d77fe7cd88d757df1522a725eb61d9e5c009b563f07ce6bf3671e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links pointing to compromised WordPress sites, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded JavaScript likely facilitates the redirection to these malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9704

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://iwish-cosmetics.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f042a791b4b---92149563342.pdf In PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160bc634fecac0---24874248029.pdfIn PDF document text
    • http://adance0112.com/upfile/editor/file/gamenileter.pdfIn PDF document text
    • http://csc0512.com/userfiles/file/20210630120845_k5f1yf.pdfIn PDF document text
    • https://www.breastcancerfoundation.in/wp-content/plugins/super-forms/uploads/php/files/d99c2dc228a44b0a4daa2bfecf432a05/nawuwijezu.pdfIn PDF document text
    • https://zazilha.com.mx/wp-content/plugins/super-forms/uploads/php/files/b256ed1bc2faaa2097f7a19df0332841/95388329222.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160bfacd8e8b3f---20566232896.pdfIn PDF document text
    • http://birzebbugastpetersfc.com/files/file/18620213438.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160a56ee1d9da4---nudixiti.pdfIn PDF document text
    • https://mcrlclient.com/ckfinder/userfiles/files/dajozejapifinetij.pdfIn PDF document text
    • https://newat.ru/wp-content/plugins/super-forms/uploads/php/files/39e949f4e51393e863f861536e289675/ganazerufugelinez.pdfIn PDF document text
    • https://prestinireedcorp.com/userfiles/files/tonukamuwepokobetirider.pdfIn PDF document text
    • https://www.golaw.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608bfe5f2cb69---337185703.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/93068486235.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/8e51ij2vspl6c8c1uj86eujo51/58412163639.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/e4101aaa29b1d390068f57a94640bd2f/33234289647.pdfIn PDF document text
    • http://www.dagmarsvendova.cz/admin/js/ckfinder/userfiles/files/lesowaferenawusepifixef.pdfIn PDF document text
    • https://medgarlci.com/wp-content/plugins/super-forms/uploads/php/files/a117cbcc732fac1c7eefe57b77f471e0/84506454588.pdfIn PDF document text
    • http://www.skup.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608e4d6803882---60071504566.pdfIn PDF document text
    • https://urbanplace.me/wp-content/plugins/super-forms/uploads/php/files/290b049a2c322f5fa9dae6aa66184fc9/99556274937.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c1c9c862018---polivesurexiwiro.pdfIn PDF document text
    • http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c333cf7cdb5---45136854132.pdfIn PDF document text
    • https://hogies.com/includes/template/uploads/file/16418345327.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/bozebizopidizolesumix.pdfIn PDF document text
    • http://dostavkaturov.ru/files/file/43162609607.pdfIn PDF document text
    • http://duquenne-moteurs.fr/webroot/upload/files/dogunadebegimaxunodexipot.pdfIn PDF document text
    • https://otartufo.com/ckfinder/tartufofiles/files/volizijovurukimugikiw.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=antwerp+is+in+which+countryPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001b582.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B582 10544 bytes
SHA-256: 1cdf296da280d04e187bbfee937f716140fa2bca125cc481b8c03b14522f64ac
font_01_sfnt_off0001cd9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1CD9A 1736 bytes
SHA-256: df551bc8d6e93fd88136e6b41d0a7e4b09c62e0bb908cd8c825f62a49ad9a213
font_02_sfnt_off0001d5d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1D5D3 22212 bytes
SHA-256: 0b7a0d7028444181512ebbac1d8ce2b844bc1d756d36ffde83333b19c5df9552
font_03_sfnt_off00020ebf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20EBF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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