Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e3a21cd10abe73…

MALICIOUS

PDF

82.6 KB Created: 2021-09-01 23:28:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 9ba815639e9ef0cafacdee8962213248 SHA-1: e8b663c20bcd7ad2c545c11b41b8a70457ea35ec SHA-256: b2e3a21cd10abe73e123a8c03bf5d678803276eb0d7f75852df3ee053b7d7231
156 Risk Score

Malware Insights

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

The PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress uploads and disposable hosting, suggesting it functions as a link farm to distribute further malicious content or phish for information. No scripts were extracted, but the structure and URL patterns are strongly indicative of a phishing or malware distribution lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://nawaasha.org/userfiles/file/94065695193.pdf In PDF document text
    • http://schodylux.pl/userfiles/file/gisigusutorukawuwevepabin.pdfIn PDF document text
    • https://www.nordatec.com/wp-content/plugins/super-forms/uploads/php/files/46hao97ugcaip4qaej1js63kfu/surumifiwuxusesifurebunim.pdfIn PDF document text
    • http://tamker.hu/userfiles/file/poman.pdfIn PDF document text
    • https://notofthisgalaxy.com/wp-content/plugins/super-forms/uploads/php/files/itkhdgpg5ldr28r8v5ttnnq9s0/63417645212.pdfIn PDF document text
    • http://supporttmes.com/clients/2/26/2647aeee05d38019bb2ff7af4ee9f9d5/File/88492841502.pdfIn PDF document text
    • http://point-grey-1970-grads.com/clients/f/fe/fe7686cf254963525dc0bd811951f15e/File/wekulodonusifexolivej.pdfIn PDF document text
    • http://asea-admin.com/_userfiles/file/20210807180032.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/7021520748b24f03ac4573153a3f7728/pikikaf.pdfIn PDF document text
    • https://www.bouwenaaneensterkwerkgeversmerk.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608ffcc44618c---nidiworunivuzuxakasi.pdfIn PDF document text
    • http://www.tecnotrefg.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f68e474b74c---98018539742.pdfIn PDF document text
    • http://uptindia.com/newsimages/file///30025123382.pdfIn PDF document text
    • https://pmeds.us/userfiles/file/gekaviwexutirunukadovukuj.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/160705d565a5dc---73894436244.pdfIn PDF document text
    • https://wulf-sanitaer.de/wp-content/plugins/super-forms/uploads/php/files/cuc7rqact7tm8aidu7gtvkct27/44015816289.pdfIn PDF document text
    • https://nsstore.mx/ckeditor/ckfinder/archivossubidos/files/32573237625.pdfIn PDF document text
    • http://www.parinet.fi/tiedostot/files/xubikafasifupoxowekexel.pdfIn PDF document text
    • http://www.hydro-tg.pro/upload/file/88106468616.pdfIn PDF document text
    • http://www.canadavisaservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088d883dde5f---60671973611.pdfIn PDF document text
    • http://sakirnoopo.ru/wp-content/plugins/super-forms/uploads/php/files/1901a212d49f04988723d9a0769e0f84/67350558459.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/wulaluwoveganesuvarulud.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/fegepefesobibedosu.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a754e8336ff---lunatof.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=snorkeling+in+cancunPDF 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_off0000dc41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC41 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f458.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF458 10408 bytes
SHA-256: 1165568bfba50f078328899c0fac9411bcc274471419beaca0d5ece53d44ed82
font_02_sfnt_off00010bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 18200 bytes
SHA-256: 9929b0a69352859c69da3d7f2b9013404170db9ba2573e5950d30e193e08f221

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