Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ecd45f4b9305b58…

MALICIOUS

PDF

75.9 KB Created: 2021-08-01 02:42:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fab5664016b9fde3554bec14f9ab1ae5 SHA-1: 8d1ee0aa9bbdb919bd5476dfd4c884f3711a21b2 SHA-256: 4ecd45f4b9305b58c5bb3989b8871c8d84bb172bcc2cd37cecf3815fdd499ab6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or trojan threat. It contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics point towards an attempt to exploit users through deceptive links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://synerhu.ru/uplcv?utm_term=poulan+pro+riding+lawn+mower+belt+diagram PDF link annotation
    • http://sl-light.ru/design/img/upload/file/8030442224.pdfIn PDF document text
    • http://fujavietnam.com/images/Download/kabizikapezijaxuwajub.pdfIn PDF document text
    • https://purefeeling8.com/data/file/botegav.pdfIn PDF document text
    • http://highlandlynxotic.com/clients/7/73/73cf6ae24f8ea70eb1cbac1dff6b0f9e/File/52987992678.pdfIn PDF document text
    • http://soul-program.com/clients/e/e8/e84723a0d254fbc5507aaa4bd1967541/File/janadepaselal.pdfIn PDF document text
    • http://danfilenemd.com/clients/67744/File/jozowibijapajo.pdfIn PDF document text
    • http://maynenkhiinverter.com/media/ftp/file/26312485042.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608137e0902e0---bifanupikejevumokebemori.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd8df7dd8a5---xujasomufosevo.pdfIn PDF document text
    • https://planet-for-events.de/userfiles/file/86893117623.pdfIn PDF document text
    • https://trucraftsmanship.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608185bf96915---vukowarowanokur.pdfIn PDF document text
    • http://pavcargo.ru/wp-content/plugins/super-forms/uploads/php/files/60ad436e1ba8e2eb9e785e76dbed6a6e/fimon.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/5e0a6910115af7405afad0f60349bb78/javoxiketulur.pdfIn PDF document text
    • http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/94870249200.pdfIn PDF document text
    • http://aldara-latinoamerica.com/userfiles/file/dexesurimuxemugota.pdfIn PDF document text
    • http://schokozentrale.de/idata/mizutumazuko.pdfIn PDF document text
    • https://seitonsolutions.com/ci/files/pojivupiwafatebavomuj.pdfIn PDF document text
    • http://valsadindustries.com/userfiles/file/wezavuzutipudumapevorolu.pdfIn PDF document text
    • http://www.molinoag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9256064df2---kegakolovikudivopepokil.pdfIn PDF document text
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160994328a67ab---losalilifo.pdfIn PDF document text
    • http://jockmurray.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f691cbdfe05---77272178830.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_off0000c68b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC68B 10896 bytes
SHA-256: 1b2471869769c254bb8c02a64d346d6525c44eb44b37510b57b39eb91ba49968
font_01_sfnt_off0000df4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF4D 16224 bytes
SHA-256: 9e8776ad91bf826422e5aa51d6aae98a83a05595b73766b5a6cd7d9f664c0a75
font_02_sfnt_off00010932.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10932 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

Open this report in the interactive analyzer, or submit your own file for analysis.