Malicious PDF — malware analysis report

Static analysis result for SHA-256 77c264b8016b6b21…

MALICIOUS

PDF

140.3 KB Created: 2021-06-26 03:31:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-29
MD5: c0fe9ca11983caeba1293b96abb94a79 SHA-1: 4dea9c3e0b1e48282625888942bb1308ee464e49 SHA-256: 77c264b8016b6b21ad4b7787b1444f28ee41dd4dd30f6b4b547b47c857b8f840
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, specifically as a phishing trojan. It functions as a link farm, containing numerous URLs pointing to compromised WordPress upload directories and other hosting, likely intended to lure users to malicious content. The presence of multiple external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9369

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://daleel.global/wp-content/plugins/super-forms/uploads/php/files/q1e7ucocln29qb1u5offb315ib/77735773819.pdf In PDF document text
    • http://conservationenergy.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074c9c12d210---43738584485.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/acfe4de8c438e0e330eacdce522ff21d/85363182503.pdfIn PDF document text
    • https://limblength-sldf.com/userfiles/file/1650935066.pdfIn PDF document text
    • http://beamstraffic.ae/amb/userfiles/file/46540958895.pdfIn PDF document text
    • https://webgirls-studio.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084e7513c6ee---mubenevuk.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608686fc3bb53---94405390714.pdfIn PDF document text
    • https://bosgo.mn/uploads/files/tebuxubuxites.pdfIn PDF document text
    • https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/f2pk66lv969dl81c0onbfrpgje/dagurovaxoxuliv.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/76be2dfe582dbcf9569cba0d6d3abe06/xabelegefevosugejavew.pdfIn PDF document text
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a089c4a7db2---tegog.pdfIn PDF document text
    • https://www.mobytec.com.br/mobytec/wp-content/plugins/formcraft/file-upload/server/content/files/16081095c106f6---xoximali.pdfIn PDF document text
    • http://alburigiott.it/userfiles/files/50356086221.pdfIn PDF document text
    • https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/ue19eg9llcol22hcg92h68pt45/89639003801.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b240d1e2881---21531052738.pdfIn PDF document text
    • http://securitydirect.it/wp-content/plugins/super-forms/uploads/php/files/86d52aae5423839aae5c691e64b4360c/newumotidojudavekijokulux.pdfIn PDF document text
    • http://audiomaster.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b1e032e0678---bikegezibemanezarowuxuj.pdfIn PDF document text
    • http://stressmanagement-karriere.de/userfiles/file/banagotuwigavoxori.pdfIn PDF document text
    • https://apexforestservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091f26d66398---virerukakudisoz.pdfIn PDF document text
    • http://hodori247.com/uploads/files/bugewudu.pdfIn PDF document text
    • http://righetti-ticozzi.it/userfiles/files/sagoz.pdfIn PDF document text
    • http://ligneus.hu/upload/file/niganigulitezuzuviwuta.pdfIn PDF document text
    • http://www.elsecretodelolivo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c99e958d20c---lediwitibu.pdfIn PDF document text
    • http://jkbprivateiti.com/userfiles/file/23842510643.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a1cbcbdc704---14085517828.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=the+greater+the+redshiftPDF link annotation
    • http://kioskcondoweb.wpengine.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ec4d48408b---91102276291.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001a4c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A4C6 16108 bytes
SHA-256: 9ea9197b6a75c7fe67a727ea228f5add925cef9a7182c4c37535d81b948c8910
font_01_sfnt_off0001b9f7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B9F7 21952 bytes
SHA-256: a0d30419cae2134a315e25ba2af2c6af87a09938e453cd76c3c61c9822071190
font_02_sfnt_off0001f3b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3B7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off00020bce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x20BCE 10324 bytes
SHA-256: 9a8e7c2ba6f4a468129ee9dd3c5fb9c529478688f987e989345bdd1e4b1d3ec7

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