Malicious PDF — malware analysis report

Static analysis result for SHA-256 2d0d8e493f53e58a…

MALICIOUS

PDF

173.3 KB Created: 2021-08-21 12:48:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 5350406c99e38379df8cd6a3614dd334 SHA-1: 91480ad4ce39d812dcf8f94a3fd5220126ecc566 SHA-256: 2d0d8e493f53e58a685a6b48e83aba4d4b6421e4c30f27aa7644a574ce40d264
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting an attempt to distribute malicious content or phish users. The document body was unreadable, but the presence of numerous URLs and the heuristic findings strongly indicate a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a07c3abc95---30398306371.pdf In PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/rexufira.pdfIn PDF document text
    • http://musorcentrum.hu/files/article/file/wakere.pdfIn PDF document text
    • https://gym-rectif.fr/ckfinder/userfiles/files/25454189266.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/6568e68c3a2887882278343c61dcbe0c/lagote.pdfIn PDF document text
    • https://www.generalutilities.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b6a7070148b---buvamibejexivejotu.pdfIn PDF document text
    • https://granchefpremiumfood.it/file/gasiseju.pdfIn PDF document text
    • http://video-cycling.de/files/file/gaxukaw.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/43be3247bd3bb845f72edf920bee9a9f/xejowinakez.pdfIn PDF document text
    • https://www.terraton.com.my/ckfinder/userfiles/files/kofepudiborifefabidege.pdfIn PDF document text
    • https://thehideawayresortpattaya.com/userfiles/files/libedekumiwowabetosatak.pdfIn PDF document text
    • https://boyanbolyarski.com/userfiles/file/kazikarokitatogitix.pdfIn PDF document text
    • https://anmoul.com/userfiles/file/41648878604.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606ef4056faf2---zedurisuferokipevi.pdfIn PDF document text
    • http://www.holzbau-hoelzl.at/wp-content/plugins/formcraft/file-upload/server/content/files/16091387312532---xifiwibomebowaxevi.pdfIn PDF document text
    • http://acupunctuuryao.nl/ckfinder/userfiles/files/71482321335.pdfIn PDF document text
    • https://ohligschlaeger-berger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a2f166a5a6d---57758894624.pdfIn PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160b26bb1bb9ab---5803313897.pdfIn PDF document text
    • https://auto-rujo.com/images-editor/file/57205473614.pdfIn PDF document text
    • https://www.ediliziaindustriale.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a7bcae368a---liderutupexopozilovuj.pdfIn PDF document text
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/0oiflcvevcb3rg37i6vaimqs7s/28287155315.pdfIn PDF document text
    • https://sabunwangi.com/contents//files/9168860535.pdfIn PDF document text
    • http://numismatika-nbkpdy.cz/userfiles/file/ririkodetag.pdfIn PDF document text
    • http://marienoellebermond.com/img/uploaded/file/25712216995.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=las+claves+de+la+numerologia+cabalistica+aharon+shlezinger+pdfPDF 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_off00023c65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x23C65 11388 bytes
SHA-256: 968e4efbdd82e34be9cd5752afc26e21f2fdec067f35bced9d9457e389d49e8c
font_01_sfnt_off000256aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x256AA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00026ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x26EBC 20768 bytes
SHA-256: 49ef67a24fb3f924fe3768b6d02c7b377566ecb715fc133c82060daf5ad295bd

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