Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b006240224eacf6…

MALICIOUS

PDF

78.9 KB Created: 2021-09-05 20:32:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: f32dae4c400f0716e0337f8fb6bab5ea SHA-1: 00ab489cab80e341eeabc4f85d07dd78db287c73 SHA-256: 7b006240224eacf6bf817c4b8a730f76abaa6da4525b9ff2a523cf53984ca9ee
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 a phishing trojan. The document contains numerous links pointing to compromised WordPress sites, suggesting it is part of a phishing campaign or a distribution point for further malware. The presence of external URIs and link farms on disposable hosting indicates an attempt to obscure the true malicious destination.

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 https://macleanpinesdrivingschool.com.au/wp-content/plugins/super-forms/uploads/php/files/8b07b5515719466b57e00aaef1dd112d/47122808815.pdf In PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a45a3aa993c---89733973072.pdfIn PDF document text
    • http://rjbmachinery.com/d/files/90040413365.pdfIn PDF document text
    • http://top-caster.com/userfiles/file/parudusadizogipal.pdfIn PDF document text
    • http://cintabogor.com/Uploads/userfiles/files/luzosewutu.pdfIn PDF document text
    • https://giga-tronics.com/userfiles/files/koguzajelevajapugo.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/5787a92898615c67a0f158ce777d7633/29318782089.pdfIn PDF document text
    • https://efsanepin.com/calisma2/files/uploads/momowodovememudezip.pdfIn PDF document text
    • http://currycornersugarland.com/admin/images/file/kosor.pdfIn PDF document text
    • https://sjalikave.hu/pictures/file/35454767126.pdfIn PDF document text
    • https://xistenze.com/files/files/61944245056.pdfIn PDF document text
    • http://hi-reid-solutions.com/wp-content/plugins/super-forms/uploads/php/files/22b3ac419158453223737410209d701d/migawibakuxijexugop.pdfIn PDF document text
    • http://www.mezmat.ru/ckfinder/userfiles/files/dexojakinated.pdfIn PDF document text
    • http://innotack.com/userfiles/files/45369821343.pdfIn PDF document text
    • https://mandalaconfeccao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607fb5777c324---nepunixiburuxekipoz.pdfIn PDF document text
    • http://maxitelt.no/wp-content/plugins/formcraft/file-upload/server/content/files/160e0e8c264dda---kurogun.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/d17611fc850bb78c85c938f573b4c85c/52088363721.pdfIn PDF document text
    • https://felicitareonline.ro/ckfinder/userfiles/files/momunumijofava.pdfIn PDF document text
    • http://slsnn.ru/content/files/xibuwigubofituzonapisijos.pdfIn PDF document text
    • https://www.cerquilho.sp.gov.br/public/admin/globalarq/uploads/files/nedewi.pdfIn PDF document text
    • https://vadihosting.com/calisma2/files/uploads/fonane.pdfIn PDF document text
    • https://yaofangpeixun.com/upload/files/xidadiwi.pdfIn PDF document text
    • http://stardentalcare.org/userfiles/file/senudomowugo.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/wukakilejizujujozeg.pdfIn PDF document text
    • https://travelsafeway.com/userfiles/file/gesevifizorigepujov.pdfIn PDF document text
    • http://bluecars.pl/userfiles/file/xixuweke.pdfIn PDF document text
    • https://nusbetaja2.com/contents//files/buxonu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=distributive+property+of+multiplication+worksheetPDF 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_off0000cd27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD27 11344 bytes
SHA-256: 118752d9969097918f388cda36e385345d84ef060479e6ae41b7ce7eb2f00b77
font_01_sfnt_off0000e797.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE797 17584 bytes
SHA-256: 4b3515fa2931acb4f3d55e7c95cf8bfcf8b273522a47ccde477691ba920da453
font_02_sfnt_off00011584.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11584 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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