Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e75f1b2a96e020d…

MALICIOUS

PDF

81.0 KB Created: 2021-08-18 05:52:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: e3d302b727d29d8aa224758dc2d2bdd7 SHA-1: 92e8ac0778ca2f47796e3d5e139e84ff8f137390 SHA-256: 0e75f1b2a96e020d5926b323cac01ca54ce698d3b465eb02ee7b015dd9fb919d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm, suggesting a phishing or malware distribution scheme. The presence of embedded URLs and the overall structure point towards an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9988

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 https://mimpishio2.net/contents//files/76287843842.pdf In PDF document text
    • http://www.maderas-navarro.com/ckfinder/userfiles/files/tuvijusapapevupolatoret.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a426e33b609---jefuwofuvo.pdfIn PDF document text
    • http://eortak.com/img/fck_temp/file/zorusewefedisozovalax.pdfIn PDF document text
    • http://apluskleaning.com/admin/images/file/80618710539.pdfIn PDF document text
    • http://bellezaeimagen.com.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160c87e2fdd90d---zibuzofodoramita.pdfIn PDF document text
    • https://angkorphotographyguide.com/userfiles/file/49861356338.pdfIn PDF document text
    • http://abapaposentados.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1611be168c7bd8---gikidifavizasokurawig.pdfIn PDF document text
    • http://splogservice.ru/content/file/23849056606.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/86950382565.pdfIn PDF document text
    • https://www.ijestr.com/ckfinder/userfiles/files/10020469865.pdfIn PDF document text
    • https://777mto.info/contents//files/82771876605.pdfIn PDF document text
    • http://aucoindeshalles.com/menu/file/50763246850.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086be78cd29b---dafeboxerizeb.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c88d6c8eaa9---71564542466.pdfIn PDF document text
    • https://www.msolartop.cz/wp-content/plugins/formcraft/file-upload/server/content/files/160713c42bbdb8---tubupur.pdfIn PDF document text
    • https://www.amiunaorchestra.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608a0413e6624---37622833485.pdfIn PDF document text
    • http://energcomb.net/cms_enercomb/sgi_userfiles/userfiles/files/zevoguzub.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/db1fcd84b952fe5469c7ad2150dd81b2/poduge.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/d2ihpttmeb3sthonkpm97qtjhq/paronikajered.pdfIn PDF document text
    • https://bomberosdenavarra.com/userfiles_nexo/files/12286476221.pdfIn PDF document text
    • https://www.physioaktivkramer.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f67e6777a5---67496823104.pdfIn PDF document text
    • http://csc0351.com/userfiles/file/20210719121730_ig15pn.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=bmw+e46+320d+service+manual+2003PDF 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_off0000d89a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD89A 16392 bytes
SHA-256: c9b689f84bcadd3c0731d71ffd60e9fad5a5bb83ad2e0717d1070ba0dc5949ac
font_01_sfnt_off000102ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ae1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11AE1 11276 bytes
SHA-256: 1154996ff16180aa6cf25be9047397a5e89a036a1583796c4cbae4bc4846bcb7