Malicious PDF — malware analysis report

Static analysis result for SHA-256 18e09268ba5fa572…

MALICIOUS

PDF

112.8 KB Created: 2021-07-08 22:38:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: e44db455bfeecf622eeb84963902f67f SHA-1: f93983b6669f4a5b49bf683193547d8e779390f1 SHA-256: 18e09268ba5fa572f4a971ec4cc91b0201e72ce6f8a60873c239fde374ca68fa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF was identified as malicious by a ML classifier and ClamAV, specifically flagged as a phishing trojan. It contains a link farm pointing to compromised WordPress uploads and other disposable hosting, indicating an attempt to redirect users to malicious content. The document body is unreadable, but the heuristics strongly suggest a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9899

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://lienlacanien.com/img_pages/file/70694009259.pdf In PDF document text
    • https://ludifrance.fr/userfiles/file/62390149970.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/ff84e6935f77318b322722c0bec82f8b/bidufires.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/c89d9e25abb4136fd0fdd40378a3092f/27452609012.pdfIn PDF document text
    • http://allycatering.com/userfiles/rilovodupawikaleve.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/08477c6f417c123816c81d3353a2d063/melunujupogaradoridopud.pdfIn PDF document text
    • https://plswa.com/wp-content/plugins/super-forms/uploads/php/files/d890a7283c1ec6ba06e2dd22cefe1e0f/99850240304.pdfIn PDF document text
    • https://monarchwinemerchants.com/wp-content/plugins/super-forms/uploads/php/files/80076b6b7e0ae947d54f1b710c6ac9a2/juzusibobixatipawetos.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608377e1113bb---38599016571.pdfIn PDF document text
    • http://au-zlato.sk/upload/files/36472697078.pdfIn PDF document text
    • http://www.studiolegalefusimorelli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607375b410f32---tazogava.pdfIn PDF document text
    • http://dossalas.com/wp-content/plugins/super-forms/uploads/php/files/9eb92d54521c2ac69aaa7649fe1ad3b6/lufumusepomipeniviz.pdfIn PDF document text
    • http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16078c244185d3---79606945132.pdfIn PDF document text
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098053ac0fe5---17925095074.pdfIn PDF document text
    • https://performanceltg.com/wp-content/plugins/super-forms/uploads/php/files/7c7f934a928fa3e9dd0472b475efc2e8/82167407424.pdfIn PDF document text
    • http://esipro.fr/userfiles/file/99708659403.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/96f14e3066eba57e6719101876f4695f/44311252059.pdfIn PDF document text
    • https://annjulieskarpmo.com/userfiles/file/konaletifelisi.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/16079bf0783a65---82810337478.pdfIn PDF document text
    • https://rosycaffe.com/file/jokototawexogewumolo.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/bgh3hoih8jadgu2tn7u942mt4r/12743445177.pdfIn PDF document text
    • http://technocom.pl/editor/file/wixulowevipikutaku.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f209d6bd30---76403668704.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=mulan+new+release+datePDF link annotation
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014b6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B6F 18716 bytes
SHA-256: 70c5d8fb5f3960d429c5d51ee1b190c60c0396abedf3d00d35a4028f2d7f0bf4
font_01_sfnt_off00017d22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17D22 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00019539.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x19539 10208 bytes
SHA-256: 0fb6779a39996868e1774fbb9c87275c5cdd64c712aadaa9930b0ea503659a54
font_03_sfnt_off0001ac4b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AC4B 1952 bytes
SHA-256: e73167954078436b2147d711cd167fa7ee81d1412130a449f96f4e8d59e77852

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