Malicious PDF — malware analysis report

Static analysis result for SHA-256 971f30c3a4dd3281…

MALICIOUS

PDF

83.8 KB Created: 2021-09-16 16:48:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: f4907d9f8afa3dbf96f98ee321db23aa SHA-1: ce25e71a24ea16d4f91b074d4f210699aa12a556 SHA-256: 971f30c3a4dd3281dfc30de8a5acafde18243b2420410902dc1d30e6f2371e25
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains numerous embedded URLs, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall structure strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://krisoc.ru/uplcv?utm_term=gta+5+online+kings+money+glitch PDF link annotation
    • http://shopabrang.com/images/files/46759418334.pdfIn PDF document text
    • http://csc-028.com/userfiles/file/20210911202707_ojjkl8.pdfIn PDF document text
    • http://problemconsulting.com/img/download/files/jederefisi.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613dfd7dd3129---14221677347.pdfIn PDF document text
    • http://zoscm.zohukum.com/ckfinder/userfiles/files/1120595433.pdfIn PDF document text
    • http://faurerom.com/userfiles/file/96069674386.pdfIn PDF document text
    • http://montagnobozzone.it/userfiles/files/97130961362.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/uuoghhrahli1hskna4te5t2s7m/97063379407.pdfIn PDF document text
    • http://celesteandtorsten.wedding/images/file/turorulepe.pdfIn PDF document text
    • https://eguiders.com/uploads/47325574839.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/82845025755.pdfIn PDF document text
    • http://memsports.com.br/admin/libs/ckeditor/ckfinder/files/daxozonewukivipemopazufa.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/xulinizesegiraror.pdfIn PDF document text
    • https://cashofferoregon.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133722f38650---44441034433.pdfIn PDF document text
    • https://www.infratechgroep.nl/wp-content/plugins/super-forms/uploads/php/files/645c6fa6b12a8be7ed49c59cd56ad0af/3227995350.pdfIn PDF document text
    • https://wtmasonry.com/ckfinder/userfiles/files/latavipelimabasi.pdfIn PDF document text
    • http://jwconsult2005.com/file_media/file_image/file/20771246090.pdfIn PDF document text
    • http://alimentosldm.com/userfiles/file/parobonotulizapul.pdfIn PDF document text
    • http://dientrotiendathc.com/media/ftp/file/rituluwuxizefi.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/161350819caee3---42295240445.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/87159299086.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/4acfbb26c8caf27eb30b7c890dcb9a7f/29161385584.pdfIn PDF document text
    • https://szalkasszorutacskok.hu/app/webroot/files/content/files/446501497.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/93942380839.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_off0000e28d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE28D 10956 bytes
SHA-256: a36ce2f638eeb63c0b8a67ceab7d454b54c601a3d4a41121fa62ab900ec989b0
font_01_sfnt_off0000fbe4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFBE4 17652 bytes
SHA-256: b7e7bc352b561990b90d2396925d7531daf49bf133bb3ae727e2f84631cb521c
font_02_sfnt_off00012985.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12985 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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