Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcbc978bd444c6c4…

MALICIOUS

PDF

74.7 KB Created: 2021-09-04 19:52:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 2888eaaf05170c02401f303fd17cc046 SHA-1: 53f56eac2409bc976615e51f585ccca100061b7e SHA-256: dcbc978bd444c6c4a1c7288efd836a18828447067b13b33a19a774c79afc5d2d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as Pdf.Phishing.Trojan. The numerous embedded URLs, many pointing to compromised WordPress sites or disposable hosting, suggest a link farm designed to redirect users to malicious content or phishing pages. The presence of external URI links further supports this phishing or malware distribution vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://pixomot.ru/uplcv?utm_term=canara+bank+personal+loan+form+pdf PDF link annotation
    • http://farashimirooz.com/files/10695750128.pdfIn PDF document text
    • http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4ffbd9e5cf---jiripevilorefedoleweli.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/xosetexopuposuwe.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/nemubivesa.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d70e02c72---tuxodakixu.pdfIn PDF document text
    • https://portsidestrategies.com/wp-content/plugins/super-forms/uploads/php/files/d97ee57ce0f6bd0852bfee3b2d5b0009/35512200766.pdfIn PDF document text
    • https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/4b3c1720eb0ecab53629bf1dd94978ab/16362559934.pdfIn PDF document text
    • http://cephedanismani.com/images/pages/file/34296321445.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/91870936211.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/41832619004.pdfIn PDF document text
    • http://casavacanzesanvito.eu/userfiles/files/ruvasuwipuw.pdfIn PDF document text
    • http://df-2.de/images/daten/file/levizafidelosezijevapig.pdfIn PDF document text
    • https://ekselantechnology.solutions/ckfinder/userfiles/files/mipivekatodunip.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/d137eb3f8c885fa29678b61868b5cc01/rizaredufapegodobutiwot.pdfIn PDF document text
    • https://yantrasearch.com/ckfinder/userfiles/files/62792021459.pdfIn PDF document text
    • http://fongyoskert.hu/userfiles/files/14898519581.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/386aknrujo39420086gv6rs0e2/jaxodevowuvupubexom.pdfIn PDF document text
    • http://www.thebetterinsurance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ca18469ba---54583546464.pdfIn PDF document text
    • https://ls-machinery.com/uploadpic/files/202108201244289216.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c94d87cdc7---99051520113.pdfIn PDF document text
    • http://cezanart.com/userfiles/file/roliridunabazavixilawa.pdfIn PDF document text
    • https://licorne-hotel-restaurant.com/userfiles/file/bodijisupaloba.pdfIn PDF document text
    • http://santeh.md/img/files/4731394440.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607904754c44d---lasavukerokibizoladerux.pdfIn PDF document text
    • 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_off0000c2ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2FF 16176 bytes
SHA-256: 7154cc94cac5a82e2cd251415eb14dc6cdaa5bfda3d469e0c21dfbd3e926cafb
font_01_sfnt_off0000ec63.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC63 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001047a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1047A 10732 bytes
SHA-256: fab6ceb693126cd494be2ae47bfc3517a1feaf1cfa837164ace22ac329661f52

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