Malicious PDF — malware analysis report

Static analysis result for SHA-256 a266af48eb6bf486…

MALICIOUS

PDF

82.4 KB Created: 2021-09-12 03:22:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: edc0023240ff3c73e71bf99812a89e87 SHA-1: f1bd8b09ef31c733e39943d0f32ebb3a96f631f6 SHA-256: a266af48eb6bf4860df48f328cfc9072babebc9098e4580d8a73dd291dc4265b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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://www.fan-consultants.com.tw/ezadmin/ckfinder/userfiles/files/xutilibefuvaruzapixite.pdf In PDF document text
    • https://protradingindia.net/userfiles/file/62342429109.pdfIn PDF document text
    • http://terezmisszio.eu/files/file/supapufifosuramoputazu.pdfIn PDF document text
    • http://membranekeyboard.pl/_data/file/roxojugefodulutedasawig.pdfIn PDF document text
    • https://proartgaleria.hu/files/files/81242506274.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210906_AD76468AC6DC460B.pdfIn PDF document text
    • http://munnartourism.com/uploads/file/73698195480.pdfIn PDF document text
    • https://machnhaduong.com/images/uploads/files/5379263705.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2d9879974---kifabemufoleroxagup.pdfIn PDF document text
    • https://xlspandoek.nl/userfiles/file/16932443601.pdfIn PDF document text
    • http://nb-magnet.com/upload/files/masusufozifap.pdfIn PDF document text
    • http://mariamozharova.ru/uploads/files/79279515809.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631357970.pdfIn PDF document text
    • http://jurabos.nl/include/editor/file/18415723998.pdfIn PDF document text
    • http://slhospital.com/upload/fckeditor/file/21877964390.pdfIn PDF document text
    • https://himalayanthailand.com/image/upload/File/79932936574.pdfIn PDF document text
    • https://daaeportrett.no/upload/file/rirurobepalotugitin.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613525d92999e---68173412671.pdfIn PDF document text
    • https://vickers-electronics.co.uk/wp-content/plugins/super-forms/uploads/php/files/3f0c0041b956b0fdf903d960bfbf68a3/51738909101.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/86317162097.pdfIn PDF document text
    • http://jinistudy.com/_UploadFile/Images/file/54159152987.pdfIn PDF document text
    • http://daiichibus.vn/uploads/news_file/fabed.pdfIn PDF document text
    • http://klenderbio.com/upload/files/kuxepusadusezakidile.pdfIn PDF document text
    • http://rollfactorytogo.com/uploads/files/kakurujovetofaxe.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/69457853692.pdfIn PDF document text
    • https://ytdrive.com/CKEdit/upload/files/fawapolunisorapuxulewi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/Om9ozkHLxGw/uplcv?utm_term=porter+app+download+apkPDF 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_off0000dd82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD82 17992 bytes
SHA-256: f2ac2747fce272142312eb260d486e37629755755b2f7ffabc5b3f5776a373f6
font_01_sfnt_off00010c7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7C 10304 bytes
SHA-256: 6f0389a815d948f20f36c34d2182a1b85039dddc286968c602d292b510fe667f
font_02_sfnt_off000123e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x123E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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