Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7c49c5734258284…

MALICIOUS

PDF

70.4 KB Created: 2021-09-25 19:02:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d511487352c71f13836a270378c5fcde SHA-1: 74bf14bae161c2a085a683a4f9772a09acb0d721 SHA-256: e7c49c573425828436b221b214475f7dffcf2a972efc8eae2ab949cffae052ea
156 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm, with multiple URLs pointing to potentially compromised or disposable hosting. The presence of 'utm_term' in one URL suggests a phishing or SEO-based lure, aiming to trick users into clicking through to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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://pixomot.ru/uplcv?utm_term=8+ball+pool+mod+anti+ban+apk PDF link annotation
    • https://telorgabus.com/contents/files/87791883557.pdfIn PDF document text
    • https://ivantomanov.com/userfiles/file/povekadakukire.pdfIn PDF document text
    • http://thanglong.vn-greenenergy.com/ckfinder/userfiles/files/73111282913.pdfIn PDF document text
    • http://fygl.net/uploads/file/141220355158.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/xidakunagurewisezuwuva.pdfIn PDF document text
    • https://hamayeshniroo.com/shop/file/4488603336.pdfIn PDF document text
    • https://girl0229960192.com/upload/users/files/93975928474.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/16144d79a0545b---rudodemisubemekixi.pdfIn PDF document text
    • https://aspirans.com/files/file/82882306424.pdfIn PDF document text
    • http://origo.ws/userfiles/file/45280474138.pdfIn PDF document text
    • http://www.britocunhaadvocacia.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/1614cb426b1443---92825255393.pdfIn PDF document text
    • http://stroynerud-sm.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac844914be---vujujorimiferuziwe.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/16146bf8d985df---wegurelixezojelojirolexet.pdfIn PDF document text
    • https://datawire.gr/files/files/gorarawidalijin.pdfIn PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/22545857619.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109061233258336.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1614d7b257f620---3645823227.pdfIn PDF document text
    • http://simkoongschool.com/uploads/editer/files/50226434319.pdfIn PDF document text
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1612f4c948ab4a---82650137356.pdfIn PDF document text
    • https://rabudiagnostic.com/userfiles/files/45183271503.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cc0b12483e---69715843982.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/pq1vephbsrr18al02fvplq585h/bedupevidut.pdfIn PDF document text
    • http://mdknoodles.co/uploads/files/71113771250.pdfIn PDF document text
    • http://vrajacreation.com/uploaded_files/userfiles/files/tojamaxu.pdfIn PDF document text
    • http://abnig.friendship-match.com/upload/files/61235361441.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_off0000b2c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2C4 10496 bytes
SHA-256: 294010c9262e37d6a447bdef74614d83179f0226bcf4eb60e2b7fc02f474caf1
font_01_sfnt_off0000ca4c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e25e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25E 16716 bytes
SHA-256: 41626000bcc9f8c2422f78ff40d5a7b8e89d9fa2c68e4e7b6a326a14b8a26272

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