Malicious PDF — malware analysis report

Static analysis result for SHA-256 75649cb6cfb6870b…

MALICIOUS

PDF

78.8 KB Created: 2021-09-02 07:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: e8be5518f9ab62765a783289eb797eec SHA-1: 7492753393f92c59e981d125a912fe314cc03208 SHA-256: 75649cb6cfb6870b0e452b47ef33b19cf727d06b9b8dd1e5ac799358cd6201f8
156 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to multiple compromised WordPress upload directories and other disposable hosting sites, indicating a phishing or credential harvesting attempt. The ClamAV detection and ML classifier strongly suggest malicious intent, classifying it as a phishing trojan. No scripts were extracted, but the structure and URL patterns are typical of phishing lures.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://jungvassar.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jutuvidogu.pdf In PDF document text
    • https://prestinieurope.com/userfiles/files/vixuwuromuregala.pdfIn PDF document text
    • http://kmkonsult.cz/userfiles/file/lopidotosujij.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a1b78c942fe---ranuxupelubem.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ae9ce507026---danakimef.pdfIn PDF document text
    • http://www.kinoimaging.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd2ffb92c81---pojojex.pdfIn PDF document text
    • http://www.accessibilite-salle-eau.com/ckfinder/userfiles/files/vajumenenagamenud.pdfIn PDF document text
    • https://my-natural-style.net/upload/files/82664281972.pdfIn PDF document text
    • https://wentworthre.com/wp-content/plugins/super-forms/uploads/php/files/e5094fda44c238b8af789c38a8f1a083/kolizegegivan.pdfIn PDF document text
    • http://suacuacuonthanhhoa.com/upload/files/97606660208.pdfIn PDF document text
    • https://doitoutdoorz.com/file/cY1OzXGMHkwoCcNn.pdfIn PDF document text
    • https://latework.cz/soubory/32755061426.pdfIn PDF document text
    • https://asiaviews.org/wp-content/plugins/super-forms/uploads/php/files/7s9e06kr2fk1a8iht2e04opje2/mazekiwizokidosibenobo.pdfIn PDF document text
    • http://xn--80aesyq.xn--p1acf/files/file/nilipetidax.pdfIn PDF document text
    • https://peilimineko.com/userfiles/file/49822831824.pdfIn PDF document text
    • https://turismoporsantander.com/aym_image/files/63158414653.pdfIn PDF document text
    • http://www.rkcomdesignservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092623ad9c27---14387395430.pdfIn PDF document text
    • http://dkmmotor.com/files/userfiles/file/jawavuxoxotosodezi.pdfIn PDF document text
    • http://simoncaulkin.com/images/47408294689.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4da9a3159---mivuzilusifibukakawapejuv.pdfIn PDF document text
    • https://magyar-logyogyasz.hu/fileok/file/nalisikunigosikujuku.pdfIn PDF document text
    • https://insights3.com/wp-content/plugins/super-forms/uploads/php/files/9834dce590c157f5011e4104283f9093/9205362070.pdfIn PDF document text
    • https://moniimpex.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ff5a32a6201---1586509940.pdfIn PDF document text
    • http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d068c641782---kafotodofigemega.pdfIn PDF document text
    • http://www.musicmaestrodiscos.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b45527f24d8---98409001953.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=gate+syllabus+for+chemical+engineering+2020+pdfPDF 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_off0000ce2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE2A 16568 bytes
SHA-256: ee44ad8e6d225490db5ca91bc77466fc7df8e3606b99e157c87377b5dcdb7ea7
font_01_sfnt_off0000f8a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8A9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000110c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110C0 11704 bytes
SHA-256: eb6399a87aa1d761bca68b31042c0ecaae324110f7ae277c9cbe8e17cfd8881a

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