Malicious PDF — malware analysis report

Static analysis result for SHA-256 22e3225625b6827b…

MALICIOUS

PDF

107.6 KB Created: 2021-06-29 22:51:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: 144339f6307b14f0f2ca05799ba3dc29 SHA-1: 7356746e2d80ed4fc602930c34cf5df62af06e57 SHA-256: 22e3225625b6827b48fcd1ffe3d4685111d27c5c48e1dfee1887ff0022ccb651
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites, many of which are hosted on disposable domains or utilize formcraft plugin vulnerabilities. The presence of external URIs and link farms suggests a phishing or malware distribution campaign. No scripts were extracted, but the overall structure indicates a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://pistant.ru/uplcv?utm_term=the+electromagnetic+spectrum+is+made+up+of+bands+of+waves+with+different PDF link annotation
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b7873517c91---jevuxirozikoxi.pdfIn PDF document text
    • https://alatheir.com/atheirwsfiles/file/jejizezidenitubigof.pdfIn PDF document text
    • https://bizdrive.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1/160a0ada675c18---69890233673.pdfIn PDF document text
    • http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607efdaac5607---65168512184.pdfIn PDF document text
    • http://agarimo.com/archivos/archivos/kisobajuwuwuk.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160b432225f645---45584071186.pdfIn PDF document text
    • http://ankurgroups.com/userfiles/file/dobijabepukuma.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b12333a68a5---wodusemabujizux.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511ea0814f---kafokimadub.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608511c3135ad---dodadilimolanapowewez.pdfIn PDF document text
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a4bb9c9787d---10699766733.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/70871224281.pdfIn PDF document text
    • http://koreaseals.com/ckfinder/userfiles/files/75672921413.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/jokiselukegew.pdfIn PDF document text
    • https://tavio.ru/files/file/dolon.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/aa61c496b855a64a7639bf349b939536/xetazudazezazal.pdfIn PDF document text
    • http://animationcoach.com/userfiles/file/xavuwetunagemixa.pdfIn PDF document text
    • http://carolstoecker.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/fokirojaretav.pdfIn PDF document text
    • https://www.chauffeur-prive-nice.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608df8bba504d---61433351873.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097088f7400f---22270358081.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607ed0e991949---6249493716.pdfIn PDF document text
    • https://gaseg.com/wp-content/plugins/super-forms/uploads/php/files/3412bdnvltftlrsngqtrl4dmtj/50808723046.pdfIn PDF document text
    • https://purpleleafestatebuyers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9a29228741---65839309207.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/54615113475.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/81kh5vtvjqpj07bfgo5dcmgqk3/ponijikopi.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_off00013d73.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D73 11420 bytes
SHA-256: 172487777ffc8518b752329ddfca16f35f91c023b8a5fac1116f992863d023df
font_01_sfnt_off000157df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x157DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00016ff1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16FF1 18204 bytes
SHA-256: 8fad99701a152d8f16b1ce53372ef8858df091367d60ee3cffcfc4ee1d2b95ac

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