Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f6956f0718b904d…

MALICIOUS

PDF

94.7 KB Created: 2021-09-06 20:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 0f2b67faab7d56e0d013d5a79d1a8f73 SHA-1: 0bde423cc1fd580485db1b34f6ff3ba04618ed64 SHA-256: 7f6956f0718b904db83aa3dcd5ad12e8e49a69d3383f0ec5c55a3a83410e13fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many of which are hosted on compromised CMS uploads or disposable hosting, suggesting a link farm or phishing lure. The presence of embedded URLs and the nature of the heuristics point towards a phishing or malware distribution campaign, likely initiated via spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 http://hoanhaochemical.com/uploads/files/14519152641.pdf In PDF document text
    • https://maydangson.com/vietkiendo/upload/file/39292918601.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/161254dfba9d90---mopulobig.pdfIn PDF document text
    • http://marcth.pl/media/fck/file/78895638315.pdfIn PDF document text
    • http://mas.vacations/wp-content/plugins/formcraft/file-upload/server/content/files/160aa63c402f9e---30711936537.pdfIn PDF document text
    • https://srmresidences.com/images/bulk_images/files/kamafodotuz.pdfIn PDF document text
    • http://danburyhighclassof1961.com/clients/b/b4/b42d7d7907ff1a67dd6fd366dd3c6775/File/rokewujemobuwasifevin.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160e4e80c13b33---70519349896.pdfIn PDF document text
    • https://atcotourismtravel.com/userfiles/file/71971531039.pdfIn PDF document text
    • http://www.alex-vasilkov.ru/images/wisdom/file/3758903261.pdfIn PDF document text
    • http://stolizstekla.ru/userfiles/file/fujapisuralogomul.pdfIn PDF document text
    • http://astro2sphere.com/admin/images/file/lijumerafeli.pdfIn PDF document text
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/bd671b8af6576c18600103de40e42022/xinadoximakex.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/70920650407.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/b6d2f8a70575e6659bd994c1848c72b0/riguvet.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085c3982d412---33666388683.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/eacf9503f214121345dd78a95c31f555/ripofomoxefulili.pdfIn PDF document text
    • http://nextgt.eu/uploads/file/pepupiz.pdfIn PDF document text
    • http://ingpoggi.eu/userfiles/files/divinagupufejufuravek.pdfIn PDF document text
    • http://bigcool.net/webroot/img/files/bifilodemefifa.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/nn29at3qven7886jb0rgj6agps/vupanafowozabuzunukuwip.pdfIn PDF document text
    • https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/c2hjm7l96guas8ovvg2j7foc57/lekedili.pdfIn PDF document text
    • https://prtl.pl/userfiles/file/81237713868.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=converter+curriculo+em+pdf+para+wordPDF 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_off00010d15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D15 18264 bytes
SHA-256: 7afc617e5e1aa0b7f561f3ee03df76139f11d2bbc0c244a4c5b9042fdef891c2
font_01_sfnt_off00013bcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BCC 10896 bytes
SHA-256: 7dfe8021f6455750180fadfaf2e13c6484dc3712e4515f8c7a323d1a0f0df028
font_02_sfnt_off00015511.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15511 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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