Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2607e6b68a0bd7a…

MALICIOUS

PDF

83.4 KB Created: 2021-09-05 14:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 78d91ba34210cd18b3c0d04ce4b647f0 SHA-1: 60f13b264d4ff7142ae9857d3dac28d419b52a77 SHA-256: f2607e6b68a0bd7ac1c48bb9fd33d25d27f4c1d68acd47b9ee8cb1e7685f1e60
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Heuristics identified it as a link farm pointing to numerous compromised or disposable domains, suggesting a phishing or malware distribution scheme. The presence of multiple external URIs and the classification as a 'Phishing Trojan' strongly support this attack pattern.

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://nomylo.ru/uplcv?utm_term=supercuts+coupon+pdf PDF link annotation
    • https://thokhoavietnam.com/upload/files/72675663280.pdfIn PDF document text
    • https://amrapalispot.com/userfiles/file/52877142203.pdfIn PDF document text
    • http://branpc.in/ckfinder/userfiles/files/36438695347.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/847f0038944ed8808a4422cfeedab715/82548154697.pdfIn PDF document text
    • https://laetitiabernard.fr/images/file/vipilururojepamujireweba.pdfIn PDF document text
    • http://improntediteatro.it/userfiles/files/47289707624.pdfIn PDF document text
    • https://cuatudongsaigon.vn/uploads/files/42518678584.pdfIn PDF document text
    • http://jp-photo.cz/soubory/files/rizaboxetixoson.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160a465dfa1729---2397354535.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/16115af4601a78---35607018897.pdfIn PDF document text
    • https://2ruoteexpo.it/ckfinder/userfiles/files/5513518114.pdfIn PDF document text
    • http://cuacuonnhanh.vn/Images_upload/files/vazojeza.pdfIn PDF document text
    • http://colorfulmedia.de/fotki/fotki/file/kirinigo.pdfIn PDF document text
    • http://jyjjapan.jp/files/ckeditor/files/43936792407.pdfIn PDF document text
    • http://maynenkhipuma.vn/quangbasanpham/app/webroot/upload/image/files/78858974701.pdfIn PDF document text
    • https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/75b15dad68a816415e90c2b6fab1cd89/pogipijapugepekupab.pdfIn PDF document text
    • https://gk-termopanel.ru/wp-content/plugins/super-forms/uploads/php/files/f870f12237e754c5ffa6f75495510c82/filudilino.pdfIn PDF document text
    • http://fixafilm.se/userfiles/file/58588787497.pdfIn PDF document text
    • http://brilspa.ro/userfiles/file///27341510280.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adf2cd576fe---94569775124.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/fd45c8369f1306a1fe46577847d6394d/47754013841.pdfIn PDF document text
    • https://deshpanday.com/ckfinder/userfiles/files/netuberizidutuw.pdfIn PDF document text
    • https://dongytueduc.com/wp-content/plugins/super-forms/uploads/php/files/7o2hv8l2ktefmu68svq8oqk2cj/37874686477.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/buvukugi.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_off0000df58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF58 10488 bytes
SHA-256: 40d17b226367f0e8b9089be4a387dde8561b22a1e8ac718f493c92c35cb17ce9
font_01_sfnt_off0000f747.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF747 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010f59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F59 18832 bytes
SHA-256: 7c9b62d56c463211858976e15bbeff64a3333057aacc2baede9e012f79958a5a

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