Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6cc247a495b0e83…

MALICIOUS

PDF

80.2 KB Created: 2021-09-06 00:53:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 4b52b0809c863f0a8feffda6ced3b872 SHA-1: babe9d2aaf0d5aef4806015c46248ce56b7778b5 SHA-256: c6cc247a495b0e83094935d4f8bfe7d7b437c4e11e3bad780ddcc9f73c8f5996
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a link farm pointing to multiple disposable hosting domains, a common technique for distributing malicious content. Heuristics indicate the PDF is designed to exploit vulnerabilities or redirect users, with ML and ClamAV flagging it as malicious. While no scripts were directly extracted, the structure suggests it may leverage embedded JavaScript for exploitation or redirection, leading to a likely phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

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.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611694c6865f1---62148713050.pdf In PDF document text
    • https://sunridgecorp.com/uploads//files/202108070300017102.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/16085d340710c3---kobokajedixideketojitiked.pdfIn PDF document text
    • http://benevolo.it/userfiles/files/riravudawudaw.pdfIn PDF document text
    • http://abpaluso.com/upload/file/nevoxijujogovufedabivawuj.pdfIn PDF document text
    • http://a9188.com/upload_files/art_files/files/20210702_124812.pdfIn PDF document text
    • http://langeline.com/ckeditor/upload/files/55713069827.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160bbc7880f23d---pekedinikos.pdfIn PDF document text
    • https://eurocomm-italia.com/file/49763710027.pdfIn PDF document text
    • http://graciaindoutama.com/kingkong/userfiles/files/18464384571.pdfIn PDF document text
    • https://moscreen.in/cmsfiles/file/81990543995.pdfIn PDF document text
    • https://actor-conseil.com/files/file/fekunovaxi.pdfIn PDF document text
    • http://surrattsville69.com/clients/8/81/8122276c22396d7fa0996010cc369f50/File/varaxakubuvilowexoxesilan.pdfIn PDF document text
    • http://industrialdevices.in/uploads/punigekafakumedux.pdfIn PDF document text
    • https://www.actionconstructionjax.com/wp-content/plugins/super-forms/uploads/php/files/ce8a8a72efcae6b11bf6a9ada6c84bf3/24545673854.pdfIn PDF document text
    • https://bursaceviritercume.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a30deed3fa---nanuzeleniposozunabi.pdfIn PDF document text
    • http://aven.su/userfiles/file/56118341694.pdfIn PDF document text
    • http://www.marcado.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608493aa21752---61098486012.pdfIn PDF document text
    • http://comicpapyrus.com/wp-content/plugins/super-forms/uploads/php/files/99ee0d022c2482d8ea668339da69605c/kolezupifalezofol.pdfIn PDF document text
    • http://tischlerei-schlusche.de/sites/default/files/file/tubunekafuzagilakujogegi.pdfIn PDF document text
    • https://electrodomesticaruano.com/images/ckfinder/files/vizisererakixijebuwoji.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/40320939118.pdfIn PDF document text
    • http://dagmar-e.de/userfiles/file/rajeroxasod.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/nelaxazada.pdfIn PDF document text
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/991783f877f72bc7d9153c0081adc88c/movop.pdfIn PDF document text
    • http://onlinevay.com/upload/files/15165656014.pdfIn PDF document text
    • https://hydratrend.com/application/third_party/ckfinder/userfiles/files/rezige.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=odmiana+sein+%C4%87wiczenia+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_off0000d136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD136 10728 bytes
SHA-256: d4134df13531f454e9094185c83021a10284614a6aeaf074437b279398248a60
font_01_sfnt_off0000e9a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE9A9 19404 bytes
SHA-256: 461d86e700939263d75e6d6429669feb8423da84d256bfa60e1eb2300db2eb17
font_02_sfnt_off00011928.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11928 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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