Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d5aaf2db430c7fa…

MALICIOUS

PDF

90.5 KB Created: 2021-09-05 18:06:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 3540e1a922e99fdbad76fe4b60fdafc7 SHA-1: 90f5eff293a46576152da4c6405f081ddff9b2d4 SHA-256: 0d5aaf2db430c7fa5f347d7deeb337a12300924dad7e0799f6f3110956cd6039
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many of which are hosted on compromised WordPress installations. The ML classifier and ClamAV both strongly indicate maliciousness, with ClamAV identifying it as a phishing trojan. The presence of external URIs and link farms suggests an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://medvor.ru/uplcv?utm_term=price+action+trading+strategies+pdf+download PDF link annotation
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8f46580752---bekipifotipenokidonosaf.pdfIn PDF document text
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/1653575f3111fd9f93fc5506d53701e7/meruwowogogorotibago.pdfIn PDF document text
    • http://letsbelegal.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/42777592832.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/mobulitonurusegafivageduj.pdfIn PDF document text
    • https://yepsell.com/userfiles/files/13705284475.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607926c52b88f---xivuz.pdfIn PDF document text
    • http://www.afamaresme.org/wp-content/plugins/formcraft/file-upload/server/content/files/1611ce03c3d69a---18874688818.pdfIn PDF document text
    • https://digicpictures.com/downloads/nasijurajof.pdfIn PDF document text
    • http://101balkon.ru/upload/files/tesumudota.pdfIn PDF document text
    • http://xperion.hu/wp-content/plugins/super-forms/uploads/php/files/3b24be48756cf16058b032951a3b3c79/xirepejapafabijoneguvuni.pdfIn PDF document text
    • https://purebodycare.courses/wp-content/plugins/super-forms/uploads/php/files/92nh7mafucb2445dkqke9h17k4/12628315185.pdfIn PDF document text
    • http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8d31c96107---wujipoposojogane.pdfIn PDF document text
    • http://herborgthailand.com/file_media/file_image/file/mepol.pdfIn PDF document text
    • http://innotec-industrie.be/userfiles/file/92215546244.pdfIn PDF document text
    • http://www.elitagida.com.tr/wp-content/plugins/super-forms/uploads/php/files/hggv9ve6kom1asrgr5ds8ucee3/97272217473.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/160871dba66bd4---lelakitefig.pdfIn PDF document text
    • https://washlounge.in/ckfinder/userfiles/files/33415802158.pdfIn PDF document text
    • https://synersys.fr/contenu/file/24988428013.pdfIn PDF document text
    • http://fixmyhelicopter.com/project-new/christianbook/upload_images/file/70147692152.pdfIn PDF document text
    • http://ahdongjiu.com/upload_fck/file/2021-6-23/20210623131007983486.pdfIn PDF document text
    • https://pristineleather.com/userfiles/file/nanosimutiwokeverivuki.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///736207892.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/271216392.pdfIn PDF document text
    • http://xn--or3bo5mvlb.com/data/editor/file/paravumuvubegalukuva.pdfIn PDF document text
    • http://intelekt.biz/uploads/pages/files/tibop.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_off0000faea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAEA 10884 bytes
SHA-256: 78b304b67689a6fdac284c2924cd1054519a55cec0faf995d9369bdbcca80a6f
font_01_sfnt_off00011410.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11410 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012c22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12C22 18320 bytes
SHA-256: 7c93b7c2d5f4c8cbc6fcdb3281674fcca226c0a2439c8a518ae233832ce60e93