Malicious PDF — malware analysis report

Static analysis result for SHA-256 1c069b04bd853159…

MALICIOUS

PDF

73.5 KB Created: 2021-08-27 14:25:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: ba7864b5eb59969db6285c83746ba575 SHA-1: d4234cb4a133324a080ba2672f31dac66d8b0860 SHA-256: 1c069b04bd8531595ba1dc74a17dcfd48e6e592bd3d5a2f5d6269ad6cd132db9
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. It contains a link farm pointing to multiple disposable domains and compromised CMS upload storage, indicating a likely phishing or malware distribution attempt. The document body is unreadable, but the heuristic firings strongly suggest the intent is to redirect users to malicious external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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://nmglyxx.com/userfiles/file/boxibefixolopigub.pdf In PDF document text
    • https://palezieux.com/ckfinder/userfiles/files/bamarurojiwagixixasuso.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/watanafiteromix.pdfIn PDF document text
    • http://kayamedbursa.com/userfiles/file/kovulezumatiguzeruwigogop.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b571908b8bf---nuxid.pdfIn PDF document text
    • http://metal-test.cn/upload/ckimg/files/202107292317477717.pdfIn PDF document text
    • http://teknis.it/userfiles/files/18629941257.pdfIn PDF document text
    • http://menloathertonhigh1980.com/clients/6/6f/6f83464fe0b13873896cace574d4baa5/File/sitigabokekubufogemo.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/4868838508.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/c51c7e7e14900b33fb436d5557e20688/tozexopodefijokaregaxane.pdfIn PDF document text
    • https://www.jscorporation.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/160865c9d3766c---99198900038.pdfIn PDF document text
    • http://istrouma1971.com/clients/9/9b/9b88b062b8d6af44b28e209fcb06d7d5/File/71681743674.pdfIn PDF document text
    • http://omeofest.eu/userfiles/files/75526341147.pdfIn PDF document text
    • http://mkconline.com/landmark/ckfinder/userfiles/files/50249121121.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/160f5285b88871---teralika.pdfIn PDF document text
    • http://stin-verdon.fr/assets/Image/files/44013963891.pdfIn PDF document text
    • http://turystyka.powiatlubartowski.pl/admin/ckfinder/userfiles/files/baxiv.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608caaae4ab52---63011769836.pdfIn PDF document text
    • http://townsendrogersfamilyreunion.com/clients/9/91/912616e09393d205379ff76530a10a1f/File/66011231085.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/26928355715.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b1b9bed6262---75252863233.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=world+record+for+cps+in+1+secondPDF 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_off0000be7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE7C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d693.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD693 10396 bytes
SHA-256: 63f0be8688e33e73baf2e553ea017602ce617f98907aa7916debff119f22fb0b
font_02_sfnt_off0000ee2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE2F 16412 bytes
SHA-256: 2a0ff04509d1a5e81ba4bb7436d6fed72bdfa60121dd621cf1127c63568c0180

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