Malicious PDF — malware analysis report

Static analysis result for SHA-256 be926b93ee64c82a…

MALICIOUS

PDF

82.5 KB Created: 2021-07-04 01:18:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 7f1ceeaea871087fc4cd42e3e95bdb80 SHA-1: 079a92016d49d36d5fcf58d15b9deac4aace2163 SHA-256: be926b93ee64c82a5f16a16279debcc7209907faa7a2245e2c879116e0b43aa0
156 Risk Score

Malware Insights

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

The PDF file contains a large number of links, many of which point to compromised WordPress upload directories. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish users or lead them to malicious content. The file's structure and numerous external links suggest it's designed to redirect users to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://klpa.net/userData/board/file/jobedikojugezazituxuxi.pdf In PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/2dd0ad477edd76f611d2d5419df2cb03/ziraxijo.pdfIn PDF document text
    • https://www.blackandwhite-salon.com/wp-content/plugins/super-forms/uploads/php/files/9a8804113d32a36f871a6d236e5693f3/mivedagelorire.pdfIn PDF document text
    • http://dr-onesrl.com/userfiles/files/41722490017.pdfIn PDF document text
    • http://mazurubezpieczenia.pl/zdjecia/fck/file/74193188311.pdfIn PDF document text
    • http://cityclick.it/userfiles/files/21351289013.pdfIn PDF document text
    • http://pokorny-podlahy.cz/UserFiles/File/mosiporezufujekedisad.pdfIn PDF document text
    • https://cedarcreeksauce.com/wp-content/plugins/super-forms/uploads/php/files/b9a8d3092d7c1fffb0f4c4be84debbf4/61143475871.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/39185139060.pdfIn PDF document text
    • http://montaze.org/democms/userfiles/file/16958833805.pdfIn PDF document text
    • http://snookerfootball.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160b84bbc41d96---65265172416.pdfIn PDF document text
    • http://china-hold.com/UploadFile/file/20210517005152286.pdfIn PDF document text
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0ee6beb036---sijulatekigeku.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/16076508e641b2---9205726759.pdfIn PDF document text
    • https://phoenixturkey.com/upload/ckfinder/files/lilipijuka.pdfIn PDF document text
    • http://canxetaidientu.com/images/file/34338798688.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160bdf06c7eebc---vewiraletifaf.pdfIn PDF document text
    • http://childconnect.com/swi/fckfiles//file/30281874136.pdfIn PDF document text
    • http://hydrem.ru/images/file/rogakapazifupur.pdfIn PDF document text
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160789f0a00a3b---77037417345.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/bc3c883798112b3057e074291ca3642a/41398590231.pdfIn PDF document text
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16083209d6b391---4946146731.pdfIn PDF document text
    • http://clearlakesd.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c78c45ced5a---mejuvago.pdfIn PDF document text
    • https://edu-mate.kr/_UploadFile/Images/file/5257114217.pdfIn PDF document text
    • http://friluftsgruppen.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a38a30343f9---64675021787.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=would+have+donePDF 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_off0000e2cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2CD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fae4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAE4 10048 bytes
SHA-256: b76548c49512786ef71683111d3313e09a8265bc90bdefb557d25bff4a755af7
font_02_sfnt_off0001112a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1112A 17060 bytes
SHA-256: 5db13bce718a4af00accb4c3fdae19e67adb04dc13f74fea5b3533704b29c6b2