Malicious PDF — malware analysis report

Static analysis result for SHA-256 59ec65edf9ad8882…

MALICIOUS

PDF

70.4 KB Created: 2021-09-05 17:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 8527fd975da316fbba91fd93edc6f02a SHA-1: 28e26ed27630382b13e5c729ad3fe98736ff9408 SHA-256: 59ec65edf9ad88825cd877840de38bb35104b7f35f1d74b9d42b0269944e3313
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a pattern of distributing malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with known techniques for luring users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

Heuristics 7

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://entone.es/wp-content/plugins/super-forms/uploads/php/files/05125ff0dfda3174e5e93306ae897fec/3354843994.pdf In PDF document text
    • http://chaitraglaze.com/uploads/viwevezerosekirel.pdfIn PDF document text
    • https://sckprime.com/wp-content/plugins/super-forms/uploads/php/files/d993f4d149969ab054d4ef4288fe0afb/tivumop.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089f4b913741---65290671158.pdfIn PDF document text
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f324f96a84b---lisugutufolivigupida.pdfIn PDF document text
    • http://getampedmag.com/ckfinder/userfiles/files/mubafavujiriwovo.pdfIn PDF document text
    • http://africanhairbraidingsalon.com/userfiles/file/tuzabifufimijotefijigifif.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d0b0a8a62c---85550684511.pdfIn PDF document text
    • http://ambulatorioveterinariovianello.eu/userfiles/files/kaninozaxis.pdfIn PDF document text
    • http://moveisgarciadigital.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160841c2b79ce8---zifikabo.pdfIn PDF document text
    • https://aneri12.eu/res/file/zivegukixokawovimi.pdfIn PDF document text
    • https://akvaguru.hu/user/file/fofupezitefoluxodotolejer.pdfIn PDF document text
    • http://shuimotongyuan.com/userfiles/file/65163338022.pdfIn PDF document text
    • http://veterina-hrib.cz/user-uploads/files/lekoxekabelupaxib.pdfIn PDF document text
    • https://network-italia.it/file/nilutame.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082b69782a78---21774594865.pdfIn PDF document text
    • https://floorco.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/cc5baba56d630546a5a78ee3ba994c04/29454213775.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/72db189a93ebc16b6763c65ef507303a/wevareropaxananixenot.pdfIn PDF document text
    • http://songhandiban.com/uploadfile/file/2021090102453873499.pdfIn PDF document text
    • http://paoladebenedetti.eu/userfiles/files/6730519750.pdfIn PDF document text
    • http://ondrejkocar.cz/img/file/razolovevi.pdfIn PDF document text
    • https://rfcorporation.net/wp-content/plugins/super-forms/uploads/php/files/f2dd4710ae22544caa65bef403af0468/37832546592.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/f58727e6ea0b3dd60799413bbdebbbf2/56721043591.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/GLLx1DTH0VQ/uplcv?utm_term=roosa+master+injection+pump+service+manualPDF 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_off0000b4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB4C6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ccd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCD8 15100 bytes
SHA-256: ea9a470071f1fe2543cbfce022e8fe8a07535266b3d78875afbf4ebec37ca6e0
font_02_sfnt_off0000f2cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2CC 10876 bytes
SHA-256: 217f1e1e342397176ce10784412d9847d3bc17b40fbb0f7ea3487ad86bcbe6c2

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