Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2e29ffbd3c143f…

MALICIOUS

PDF

83.9 KB Created: 2021-06-29 23:00:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 339293d51cf6717f2c226d3d31655090 SHA-1: 7699ecc73e0ec8b3c27c09a169a0315213cf7ecb SHA-256: 4e2e29ffbd3c143f4a6a34f58760341656379009041ef5ab82991a3303a7dbea
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised CMS upload storage, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URLs are the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608672ff5b547---mavol.pdf In PDF document text
    • http://akvatoria.by/UserFiles/files/beweraxodada.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/guvipudinitaj.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/a4f0dcde246422f8fde375a8305cb93e/38129629105.pdfIn PDF document text
    • http://caydinhlang.net/userfiles/image/file/zaxagakisow.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a2bbbf13976---11934923394.pdfIn PDF document text
    • https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/f39b40c7300d4b073e72d7bb63abaa2f/nawurotabegid.pdfIn PDF document text
    • http://www.ambredore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a42fa5388b0---ribeker.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606fb754582c0---68872584948.pdfIn PDF document text
    • https://agsposure.org/wp-content/plugins/super-forms/uploads/php/files/7c84128454624753cd04dd45009c2883/86665067983.pdfIn PDF document text
    • http://permanentnimakeup-brno.cz/userfiles/files/pudowofisezilul.pdfIn PDF document text
    • http://toeicspeaking.net/_UploadFile/Images/file/pofegojunu.pdfIn PDF document text
    • http://zawayakw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079e68e42c7d---78582101790.pdfIn PDF document text
    • https://lion-trading.co.uk/wp-content/plugins/super-forms/uploads/php/files/64s047tgsfgltsmlb41jvehnn3/mepurijefuzenep.pdfIn PDF document text
    • https://olivier-daulte.com/ckfinder/userfiles/files/mabeviwexariduwupigaxol.pdfIn PDF document text
    • https://www.dazzlingdecor.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1606d4da699a5d---12109278743.pdfIn PDF document text
    • http://suankaew.net/upload/userfile/files/48897058313.pdfIn PDF document text
    • https://chicagoportablexray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b59adb780e9---gaxodavixugufabuporerazu.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/f0987a7f673a47ae8a8758e032cdf2c0/tivajudi.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/98505399635.pdfIn PDF document text
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/jawovanuxabifirugefopak.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/lds21fv4cf24e5s27f1sglfce6/47530155641.pdfIn PDF document text
    • https://controlcert.se/wp-content/plugins/formcraft/file-upload/server/content/files/16074768f03caf---33744604487.pdfIn PDF document text
    • http://makaeximworld.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afad950cd27---nemonarig.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=the+root+test+for+convergencePDF 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_off0000e277.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE277 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA8E 10344 bytes
SHA-256: 0196c2858274ec131e4bd4c4999dde56608dec57ee1e35fec4c912dbe6317dc9
font_02_sfnt_off000111ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x111ED 18332 bytes
SHA-256: 5dda0cb051770084eac801c2980d422d2eed71305c9cdc59a158df2ad3511533