Malicious PDF — malware analysis report

Static analysis result for SHA-256 432e4be04c0a04f7…

MALICIOUS

PDF

97.0 KB Created: 2021-07-13 05:26:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: 76117d6665aae8592b42e8a0503d5240 SHA-1: 9743fe70251ffa96e52a27784e330cc7b255072b SHA-256: 432e4be04c0a04f79c1a3ef38a040271c0f4f4103c4d06434a6b0823dfbb4592
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs pointing to potentially compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were directly extracted, the structure and embedded links are characteristic of a malicious PDF designed to redirect users to harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

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 https://crysiq.ru/uplcv?utm_term=jehovah%27s+4+attributes PDF link annotation
    • http://oaklandscreche.ie/userfiles/files/70229303022.pdfIn PDF document text
    • http://evohome.pl/userfiles/file/65309539806.pdfIn PDF document text
    • https://rhdplumbing.com/wp-content/plugins/super-forms/uploads/php/files/4712802ec040f4d5b9199e57cec0fefb/93062797465.pdfIn PDF document text
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609f7e2231820---25600865766.pdfIn PDF document text
    • http://arch-teh.com/pic/userfile/rasapikivasewividifobena.pdfIn PDF document text
    • https://cffcommunications.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160ab8d404e93d---59037477755.pdfIn PDF document text
    • https://tigercabinetry.com/wp-content/plugins/super-forms/uploads/php/files/f19018badc3ff0d2e558220656a2538d/jelut.pdfIn PDF document text
    • http://urbanconstructions.org/images/uploadedimages/file/55860753599.pdfIn PDF document text
    • https://kovosluzba-praha.cz/res/file/penejegeb.pdfIn PDF document text
    • https://www.sussexweddingservices.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16076c3ed73d3c---pelir.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/19rk5q3uelkob9cfn76ejdci16/siwoluropuzokazapinijud.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1608dafed6bac1---12725164517.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084cb7bda613---vezisasidovegiw.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/vepagewunamizukakedunogo.pdfIn PDF document text
    • http://nuraski.pl/wsg/userfiles/10390399363.pdfIn PDF document text
    • http://tfh-filter.hu/_user/file/9320128076.pdfIn PDF document text
    • https://ctapigroup3.com/contents//files/basamevigalav.pdfIn PDF document text
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/a872690f6ef76bd78b0f6bb12aad0c38/kitusapafetaf.pdfIn PDF document text
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072e7752f5db---niledofamonozetamepab.pdfIn PDF document text
    • http://geoplan.su/userfiles/file/delofajo.pdfIn PDF document text
    • https://tlpnw.com/wp-content/plugins/super-forms/uploads/php/files/1672ea7ca06000a5b5f0a9a206beaec0/xefiz.pdfIn PDF document text
    • http://baigeleather.com/userfiles/file/61272183099.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4d1c70aac---tuxep.pdfIn PDF document text
    • http://nissanotogovap.com/uploads/images/files/20550635219.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_off00011a21.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11A21 17316 bytes
SHA-256: 453491cce44caaf02b09e374069338443d8600701b4d2481ae285bede6fd6b6a
font_01_sfnt_off000146cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x146CF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015ee6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15EE6 10464 bytes
SHA-256: ff04c140b2f842a0ab8e63995a1b0ba8b44672b40c74c28060900eabe7e80b60

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