Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfa84021102d01de…

MALICIOUS

PDF

88.8 KB Created: 2021-10-07 10:55:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 38b1851b8deb7c53bf8f33a500e55765 SHA-1: a2b49a21dd24b152349890f820717f2996253e79 SHA-256: bfa84021102d01de31da9cc2bd000cfd255e6d3095033f4f99f16e56f739c8e7
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to compromised WordPress upload storage and other disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while numerous, do not appear to be directly executable but serve as lures to external malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9922

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://alrabbancapital.com/file/files/75201086588.pdf In PDF document text
    • https://kiemtoandongnghi.com/public/plugins/ckfinder/userfiles/files/wiwakodixokidomumer.pdfIn PDF document text
    • http://esenkardeslerinsaat.com/resimlerfiles/sebedud.pdfIn PDF document text
    • http://highdesertrent.com/newsite/images/uploads/file/kosoxudizatugev.pdfIn PDF document text
    • https://vyaspublicschool.com/ckfinder/userfiles/files/38002667457.pdfIn PDF document text
    • https://bbensonmft.com/wp-content/plugins/super-forms/uploads/php/files/fd760c030098ba5999a0fae25662dac4/kiguwiwogoxugomegesixu.pdfIn PDF document text
    • http://www.coverseg.com/uploads/ckfinder/files/zowewapijegifiwomuzibaju.pdfIn PDF document text
    • http://ehomerealestate.org/images/file/6281741760.pdfIn PDF document text
    • http://triatlonbizuterie.cz/sites/default/files/file/17417277046.pdfIn PDF document text
    • http://mbeautyconcept.com/upload/content_images/file/70793614362.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-15/20210915165433353019.pdfIn PDF document text
    • https://bishopsalamatkhokhar.org/userfiles/file/rejurotaposimu.pdfIn PDF document text
    • http://steclotildehorton.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16144d9b81147d---3723648381.pdfIn PDF document text
    • http://churchtextile.com/userfiles/file/xorivolawopesofosomaviboj.pdfIn PDF document text
    • https://40parables.com/wp-content/plugins/super-forms/uploads/php/files/ef2064474e17e6be04f437eeedab76c3/nuzebu.pdfIn PDF document text
    • http://emilygrilltogo.com/uploads/files/todemanawe.pdfIn PDF document text
    • http://lt101shop.com/userfiles/files/32022854614.pdfIn PDF document text
    • https://ktmcollege.org/public_html/userfiles/file/69287078828.pdfIn PDF document text
    • http://mh-gartengestaltung.de/userfiles/file/tarikuridoburapunorum.pdfIn PDF document text
    • https://www.andimoda.com/wp-content/plugins/super-forms/uploads/php/files/54aa1a86cf9e945964fbc222bffafe98/jejegiroxoladujeji.pdfIn PDF document text
    • http://onlineticketreview.com/images/file/40399207778.pdfIn PDF document text
    • http://robbes.nl/media/files/15844360297.pdfIn PDF document text
    • https://swiz.eu/files/editor/49555181214.pdfIn PDF document text
    • http://schule.havonix.com/ckfinder/userfiles/files/napigewanoxexesimimixisep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=wanted+weapons+of+fate+cheatsPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d789.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD789 10556 bytes
SHA-256: 2502de6161da8a67abbc2d51d3713c0ee5e8aca50b8e2217464dc5220ce2fb44
font_01_sfnt_off0000efa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFA3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B5 22240 bytes
SHA-256: 5240a4784f070066f20a4e07b3d70d3b66a4329929d28a9d444b7dd65651ccb3
font_03_sfnt_off00013f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F9F 16132 bytes
SHA-256: da3599785d691edba6bb1dc804d5dbf9cdb050cf7bdfa967d514dff539c0bfb6

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