Malicious PDF — malware analysis report

Static analysis result for SHA-256 d294b5aff7ccfaeb…

MALICIOUS

PDF

124.3 KB Created: 2021-07-19 01:00:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 4e351c1e38902902b6dedcd94a0369f3 SHA-1: a58cae71ca8b5c30682bf7fa8afc20879ed4c222 SHA-256: d294b5aff7ccfaeb43e278d2f508f9e970d910839c39136779ab6a5722fce0b8
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was identified as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs pointing to compromised CMS uploads and disposable hosting. These links are likely intended to redirect users to malicious sites for phishing or to download further malware. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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 http://fitviewer.de/files/file/gegakizesugajixa.pdf In PDF document text
    • https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1e50f2905---55598999643.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/69311109361.pdfIn PDF document text
    • https://dcimx.com/files/83525567714.pdfIn PDF document text
    • https://gfow.om/wp-content/plugins/super-forms/uploads/php/files/kqagvtoolg7letskd38kbr41e3/selavuwaxokejanonebigedef.pdfIn PDF document text
    • http://sieckultury.pl/wp-content/plugins/super-forms/uploads/php/files/cda8aefbc7c23abcabd64c37304bc3e1/duzusifiboniposagopumo.pdfIn PDF document text
    • https://alexandrapanayotou.com/web/images/static/file/18595294447.pdfIn PDF document text
    • http://emons-verlag.net/testarea/cwsCMSlight/media/files/27286340253.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce191df120---15769215896.pdfIn PDF document text
    • http://soundreaming.org/wp-content/plugins/super-forms/uploads/php/files/3190ca3ba0aac694c02b4a4e0ddc1a7b/nalusanuxuzeji.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d914b8d5781---mexemad.pdfIn PDF document text
    • http://cichanski.com/Upload/file/basetafuvobupu.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/8bd6384fe25f5d72929c4b151c9c7814/virowagapumaradokiwawum.pdfIn PDF document text
    • http://kotolantopeni.cz/file/28152378607.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16099551898ed1---gimugapojuzivesan.pdfIn PDF document text
    • https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/292231f5833ebb05906bc1693d0a7ddf/seduduwebiwelijalokogut.pdfIn PDF document text
    • http://www.aportecnica.com/imagenes/editor/file/vojuboxuridalekitopel.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/ee4ce5031639a23960b7f202dbb272ed/28297662413.pdfIn PDF document text
    • https://a2designbg.com/userfiles/file/56297467958.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/ae6sbpeofp3l1cj3ifu06gqf8d/zajevefawozutivowiz.pdfIn PDF document text
    • http://ahkjt.com/upfile/file/wipezovisasovaverizo.pdfIn PDF document text
    • http://aitrans.cn/UploadFile/file/F1202106091244018755.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/efac8fb8274e4030db7cbf0b03d5bb06/watul.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/1cdb56d63574cc0ea3cbbff241756d40/80654398980.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=kiss+me+kiss+your+babyPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00017f40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17F40 10460 bytes
SHA-256: 38029fc067da91bd0fac96b7c6fad31071f169f1e3fcab7daea980385a37eb6e
font_01_sfnt_off0001970a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1970A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001af1c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1AF1C 20340 bytes
SHA-256: 62f2273fb92e06b50f77bfefb75028a042aef56ce18e278487a33410eb3a985a

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