Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d8f02a5d846901…

MALICIOUS

PDF

88.2 KB Created: 2021-07-16 07:37:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 1137fdece9a908b0ce1d9b4dd1f992c7 SHA-1: 197401d946085ad4b72942b19255b9bd0e57682d SHA-256: a3d8f02a5d846901a52f183e3da57afb1497b06a542bebd17006e006b38b6c78
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 CMS upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites or download further malware. No scripts were extracted, limiting the analysis of direct execution capabilities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://ludifrance.fr/userfiles/file/43495969845.pdf In PDF document text
    • https://g3az.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d6b497de90d---82831136458.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/b557a20ab9e42b822d8e2f16c9645f65/jakofunekerarobimuvitunan.pdfIn PDF document text
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0f39127f01---36958024874.pdfIn PDF document text
    • http://ingenermarket.ru/userfiles/53029742427.pdfIn PDF document text
    • http://www.segurosfacility.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160965873aa680---65042319385.pdfIn PDF document text
    • http://studioaba.net/userfiles/files/59544659255.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/45bd12530deda7dfd52032311d4f81fc/94363963873.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/e7bc65ec0eda7cc9ee0dd6309dacef09/tenoxawi.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/90837895445.pdfIn PDF document text
    • https://www.pennlighting.com/wp-content/plugins/super-forms/uploads/php/files/1f61d1ebc9c453a6517b649fde4a4059/tuvutiwamovalatedetir.pdfIn PDF document text
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e5e8a651d2---mofimiki.pdfIn PDF document text
    • http://cmtoolsrental.com/user_img/files/83971884487.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/korat.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/t1r7vs0th0okt1rn96mr1qm9jj/73813342128.pdfIn PDF document text
    • https://dietacud.eu/upload/file/lixilulegetu.pdfIn PDF document text
    • http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608403234bbe0---1723214801.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/bikutenefafelubis.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160881a4d41dd3---fuxumuvoduvixupub.pdfIn PDF document text
    • http://www.halpellet.hu/userfiles/files/32664618439.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160842e98274c0---74500402805.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b4c5b1893c6---dizaroxilukob.pdfIn PDF document text
    • http://mgocsm.in/userfiles/file/vugupoda.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=causes+of+yellow+eyes+in+adultsPDF 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_off0000f849.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF849 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001105b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1105B 16628 bytes
SHA-256: 7e4cb4d6ffbdbb829df725e8d559e9c63b5b9dc4088f5d778d4b308a62952a64
font_02_sfnt_off00013b7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13B7E 10580 bytes
SHA-256: dd55358ccfb4f364e15a8a89191c4cec62d9b6a7040ae4e372d12bf3b9cc8260

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