Malicious PDF — malware analysis report

Static analysis result for SHA-256 822897338b0368b4…

MALICIOUS

PDF

81.1 KB Created: 2021-08-06 20:09:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 63c2cfd718edfcbf7df628df1b614b12 SHA-1: ce29919b7a6a665998ffcbc8cb92cb87472de0d0 SHA-256: 822897338b0368b4ce6749299c8b77c3963dd357c0be463f3ae5acb53670b5f6
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs that point to external resources, many of which are hosted on compromised WordPress sites. The presence of 'utm_term' parameters in some URLs suggests an attempt to track user engagement, common in phishing or scam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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://infrive.ru/uplcv?utm_term=how+to+hack+wwe+supercard+season+5 PDF link annotation
    • https://rittenhousesmiles.com/wp-content/plugins/super-forms/uploads/php/files/8a27904abac5515bdcb57eb4ca252ca7/mexezuvoroli.pdfIn PDF document text
    • http://njf724.com/basefile/janatalnajafcom/files/36768853674.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160be86597cfbe---godorolexojezolonibu.pdfIn PDF document text
    • http://temple.mo/userfiles/file/40319595223.pdfIn PDF document text
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/nadafopaxasuwezebewit.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16092d26e06734---vodukaworaparikezej.pdfIn PDF document text
    • http://www.medical-psychology.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16076669cb0f5c---4175462542.pdfIn PDF document text
    • https://psfund.org/public/uploads/files/cms_files/44453712764.pdfIn PDF document text
    • https://giritrademark.com/content_files/files/falewimoxitumutigilasuxe.pdfIn PDF document text
    • https://concertwristband.com/resimler/files/72237321154.pdfIn PDF document text
    • http://color-gateway.com/userfiles/file/86251459859.pdfIn PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609691f5e501e---sonilekili.pdfIn PDF document text
    • https://www.kasekimi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077756a77dc3---lakodelufagobaxitawup.pdfIn PDF document text
    • http://bertoniamministrazione.it/bertoni/public/file/80262466295.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/8f03970455eaae1a8c7703d2e7210b37/vesuzax.pdfIn PDF document text
    • https://stgeorgedentalcare.in/ckfinder/userfiles/files/bimonake.pdfIn PDF document text
    • http://twfbs.com/ckfinder/userfiles/files/75612963071.pdfIn PDF document text
    • https://aldaserwis.pl/ckfinder/userfiles/files/pokovitodetefotetazukepe.pdfIn PDF document text
    • https://jiptv.nl/wp-content/plugins/super-forms/uploads/php/files/6k8rvh00t5q7b8smuup9pom4s9/66507103077.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160c41f92d8b40---8038247946.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8ea496d912bf49ccc2706c9b539ead46/lubowilip.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d7bb9fda513---kuwomepezatalumeguku.pdfIn PDF document text
    • http://farashimirooz.com/files/zenuwotixesu.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/d88db402aabe2aebda4e0c7e8c0cab2d/29031130670.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/312ffe444511621049aca9dad88baed1/59831126209.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_off0000d99b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD99B 16292 bytes
SHA-256: 568b343728287d1a663ba10fa3213a94924d8182d38859bf9a6b7bae91a8845d
font_01_sfnt_off000103f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103F2 10876 bytes
SHA-256: 9847733478652f1dfb7ffbf67ba6c56eca8bc1bfc642f122cfc5cc3982cf0ecf
font_02_sfnt_off00011d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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