Malicious PDF — malware analysis report

Static analysis result for SHA-256 e37ca7d956854ca1…

MALICIOUS

PDF

82.7 KB Created: 2021-09-20 10:21:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 5f62fb96705a1a0d0ebb6882df6732b4 SHA-1: ee3960a799e9a2c5332435928e091537847c87c7 SHA-256: e37ca7d956854ca165f379c15aaa1ea6e7be80144bd216e90d5d21514d286296
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains an embedded JavaScript stream and numerous external URIs, many of which point to link farms hosted on compromised WordPress sites and disposable domains. These links likely serve as a lure to download further malicious content, as indicated by the ClamAV detection and ML classifier flagging this PDF as malicious. The embedded JavaScript may be used to facilitate the download or execution of a second-stage payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://lepetitjaunais.com/userfiles/file/nanirovekuzugetebilem.pdf In PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/b8jbq4opu10h0mlpp6qkgkk826/37952915069.pdfIn PDF document text
    • https://imad0c0.com/js/ckfinder/userfiles/files/wulodonevurebud.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/161329b9657c2a---35464830162.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/gabidupuxebegase.pdfIn PDF document text
    • https://swotin.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133b7f37d4e5---gulomepubogapinav.pdfIn PDF document text
    • http://brukbet.com/user_images/file/73581959645.pdfIn PDF document text
    • http://cetinelektrik.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1612f7ab6d5dec---kufanifiwaj.pdfIn PDF document text
    • https://abril.pe/wp-content/plugins/super-forms/uploads/php/files/qqek675vdord1rjn93a10b8pv6/35039328177.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/12219255599.pdfIn PDF document text
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/161322f0ca3d4c---temebure.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/74176760623.pdfIn PDF document text
    • https://rmissio.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613e04889dc33---vaputuvevulekogesoravu.pdfIn PDF document text
    • https://alpinebadmintonacademy.com/ckfinder/userfiles/files/sijaji.pdfIn PDF document text
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a033d9d42e---befaret.pdfIn PDF document text
    • http://bestapp4u.com/admin/uploadedfiles/file/sibelofubepetoraxanig.pdfIn PDF document text
    • http://euro-ex.net/images/blog/file/xuxifexi.pdfIn PDF document text
    • http://atel-j.nl/uploads/files/bimomuzujorekovij.pdfIn PDF document text
    • http://cravaluos.com/ckfinder/userfiles/files/vodonezuwixazipisix.pdfIn PDF document text
    • http://dietaltop.com/userfiles/files/nizoxizowab.pdfIn PDF document text
    • http://csc0516.com/userfiles/file/20210903105133_n07jcx.pdfIn PDF document text
    • https://technoarc.net/userfiles/file/zuvotosizobuvujufesa.pdfIn PDF document text
    • http://mineraux-et-lithotherapie.fr/ckeditor/upload/files/89202115044.pdfIn PDF document text
    • http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/2063775533.pdfIn PDF document text
    • https://pachetedeturism.ro/images/files/33742059881.pdfIn PDF document text
    • http://gestaocipa.com/public_html/Imagens/file/50127523013.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=lucid+dream+app+androidPDF 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_off0000ddaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f5c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5C1 18076 bytes
SHA-256: 1a3fc76bf8e677312e6a32ed1854afb29349287fc1e7d30b03d7d81d53cf8a37
font_02_sfnt_off00012545.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12545 10420 bytes
SHA-256: 105dcc376acd8a5fa23aef84715448afd3bceed6a14b7575447c675fa2937e66

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