Malicious PDF — malware analysis report

Static analysis result for SHA-256 201f20b4cf5edab9…

MALICIOUS

PDF

78.2 KB Created: 2021-09-01 01:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: c5fab65123edbf984ca0985eae58c53e SHA-1: 60c2794283dadfb0b189b8b142caeaa228996121 SHA-256: 201f20b4cf5edab91c2a50b717ad4198dc8d9908807290c0fa673cf2b42802d2
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised CMS uploads and disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or SEO spam. The document body is heavily obfuscated and contains no readable content, suggesting it's designed to be non-transparent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://infrive.ru/uplcv?utm_term=water+flowing+in+river PDF link annotation
    • https://cezartravel.hu/userfiles/file/rifoneguxejozorov.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/c8cb1255affad5e78cf9b2c97dce3577/16700991446.pdfIn PDF document text
    • http://stopasbestos.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb4a13143b---lukikirosavofekeso.pdfIn PDF document text
    • http://theofficefurniturestore.com/ckfinder/userfiles/files/15959691004.pdfIn PDF document text
    • http://safetypath.net/cms_images/22174491994.pdfIn PDF document text
    • http://kaymccarthy.com/immagini/file/gazoxidajagisubirizebi.pdfIn PDF document text
    • http://www.jesuseslaroca.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce7c653a5d---14651558847.pdfIn PDF document text
    • https://powermailer.in/userfiles/file/78224585415.pdfIn PDF document text
    • http://nickelsgrafikdesign.de/ckfinder/userfiles/files/zoripijogexirov.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/69899569807.pdfIn PDF document text
    • http://dichvutheapec.com/upload/FCK/file/tigadoxu.pdfIn PDF document text
    • http://trenermichal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160bcaeab42729---lojelex.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/ribawoxosalen.pdfIn PDF document text
    • http://awarelaxcentrum.cz/user_files/file/97879432175.pdfIn PDF document text
    • http://srmtteaparty.com/uploads/files/202108141535194220.pdfIn PDF document text
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/3daa4ded669943d6cddb50d035accb87/42965604717.pdfIn PDF document text
    • http://homeloanz.net/images/e/file/11900150474.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/12068154703.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/20068531043.pdfIn PDF document text
    • http://karat-dobremiasto.pl/userfiles/file/40358270616.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/n0nenbrqeiuvk4dbodlvn0cag2/lesavetexewotixuxu.pdfIn PDF document text
    • http://www.opencalgary.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609b408b5399a---86562146208.pdfIn PDF document text
    • https://termoformat.md/img/files/lotuxedifov.pdfIn PDF document text
    • http://cesishotel.com/res/wysiwyg/file/39415873296.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_off0000ccdd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCCDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e4ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4EF 17756 bytes
SHA-256: 97a81c9bbece2bc983a715364a11422d859d2bac04dc4544ce3aa847e6196a9a
font_02_sfnt_off000112ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112ED 10364 bytes
SHA-256: 46dd0b3c10fdf59c7c1a09f67f2305af7219320d390e243a97fb84a601909074

Open this report in the interactive analyzer, or submit your own file for analysis.