Malicious PDF — malware analysis report

Static analysis result for SHA-256 c680e580503bec59…

MALICIOUS

PDF

80.4 KB Created: 2021-09-03 19:58:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 45231d54cb90a7c1201d4fca58335d44 SHA-1: 0e32b7ccd2cfd28be4806cd4b643585454a3e727 SHA-256: c680e580503bec599cb4f3084b76c3ea5526a48ede09936f3481cf2987a6fd89
156 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to compromised websites or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier strongly suggest malicious intent. The embedded links are designed to lure users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://vesimport.ru/userfiles/file/75470193199.pdf In PDF document text
    • https://edoxmarketing.com/wp-content/plugins/super-forms/uploads/php/files/aaovo0jovps28n72k22jeiv5s3/2857586135.pdfIn PDF document text
    • http://np-laser.com/upload_fck/file/2021-8-26/20210826051630712653.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/73ef36a3d2458f4af1bcb8386a6f2f55/38638333182.pdfIn PDF document text
    • http://muabannhagiare.net/images/uploads/files/71332670439.pdfIn PDF document text
    • https://bangprice.com/bangprice.com/beta/cms_image/file/56334171247.pdfIn PDF document text
    • http://annabarons.lv/files/files/winijixakitoziberamezepuj.pdfIn PDF document text
    • http://hometextiles-consultant.com/ckfinder/userfiles/files/74923719669.pdfIn PDF document text
    • https://bisnismedsos.com/userfiles/file/20987226506.pdfIn PDF document text
    • http://studiobardinisrl.com/userfiles/files/16219045459.pdfIn PDF document text
    • http://redwoodpwr.com/wp-content/plugins/super-forms/uploads/php/files/dd7qju724br08na83t6u57cf32/60176322120.pdfIn PDF document text
    • http://bpsstudio.hu/uploads/70958229954.pdfIn PDF document text
    • http://hattingtoemrerogsnedker.dk/userfiles/file/71670810737.pdfIn PDF document text
    • https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/e52a0f805a47f002c2924390b73bfeb1/15940746277.pdfIn PDF document text
    • https://folklorebridge.eu/uploads/pictures/files/vosowupik.pdfIn PDF document text
    • https://motionslam.com/wp-content/plugins/super-forms/uploads/php/files/0eb4682ced3490d9d4d4d42c98718030/lubinukikukebag.pdfIn PDF document text
    • http://tahi.hu/ckfinder/userfiles/files/10808951526.pdfIn PDF document text
    • http://aodaibooking.com/FileData/ckfinder/files/20210809_A4961D0A7FBC6622.pdfIn PDF document text
    • http://inspirationallabels.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1608c900d6d4f8---sewifibujixisunoz.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/38695143020.pdfIn PDF document text
    • http://coming-c.com/userfiles/file/sosomigidilasukiw.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/p0364v5dd1oith7rrhli4iipp1/88587631784.pdfIn PDF document text
    • http://hoggard1975.com/clients/a/a4/a43fc1111b7ad4318f8b553feb79a890/File/93219711216.pdfIn PDF document text
    • https://kamber.dk/wp-content/plugins/super-forms/uploads/php/files/d618fc78899045fe8871e07853518c17/xafiximekeninajikarubu.pdfIn PDF document text
    • http://morard-mcf.fr/data/Files/64565554278.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=philips+avent+microwave+steam+sterilizer+manualPDF 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_off0000d2af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2AF 10952 bytes
SHA-256: f72b6f8932009a7bb42a96e367f8d4bc39f9e5bca05d33be969b74fa68dbde90
font_01_sfnt_off0000ebf7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBF7 18216 bytes
SHA-256: 0a35f3f0dc4d27710a0942bed68d6cc6a7c7b7f4b9843bc182075cc26c24922c
font_02_sfnt_off00011b41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1