Malicious PDF — malware analysis report

Static analysis result for SHA-256 aae7201217d2a8ee…

MALICIOUS

PDF

81.1 KB Created: 2021-09-06 23:18:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: 6d983547f5d086370117afb69239e8c8 SHA-1: ea5ebe1e3bd3114386e31409feb9d56939a5b7ee SHA-256: aae7201217d2a8eea4239011cb3834c1d95c539e04cf78fd21de7ccd0d6c3b79
156 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. Numerous heuristics indicate the PDF functions as a link farm, directing users to various external websites, many of which are hosted on compromised CMS platforms or disposable domains. The presence of UTM parameters in some URLs suggests a tracking or phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://smidgel.ru/uplcv?utm_term=sharp+pn-le801+pdf PDF link annotation
    • http://apexibd.com/uploads/fck_uploads/file/bumopevogogafaja.pdfIn PDF document text
    • https://adbadog.com/wp-content/plugins/super-forms/uploads/php/files/2850f3833171baa35c1d722a82d3ce55/dedikifuforegama.pdfIn PDF document text
    • http://charivne.info/images/file/9181166887.pdfIn PDF document text
    • http://ilovehikari.com/uploads/files/sepusukopibeto.pdfIn PDF document text
    • http://www.klpreschool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160802d13923a5---doderajibevokanafu.pdfIn PDF document text
    • https://www.cukoyem.com.tr/wp-content/plugins/super-forms/uploads/php/files/gva2i9q8a37plgrj5njk2bb6s5/17061478351.pdfIn PDF document text
    • http://www.dnevi-sekretarjev.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16096d28b92cbd---xukurevajenetatit.pdfIn PDF document text
    • http://lovesenergy.com/file/zososepugibaxa.pdfIn PDF document text
    • http://brownewingfamily.com/clients/a/a4/a4d7a48ed280e719b438ae57db99af5e/File/basare.pdfIn PDF document text
    • http://shihtzufurbabies.net/clients/d/d3/d383cf0c90cf2d2391705d5438694b4c/File/jewotudipoxezali.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2a3e9085e---xetotunalerobex.pdfIn PDF document text
    • https://law.myvzl.com/wp-content/plugins/super-forms/uploads/php/files/k9ftsr3d6c87evr7tt7nbrmpdg/90664355883.pdfIn PDF document text
    • http://www.hj-bouwt.be/wp-content/plugins/formcraft/file-upload/server/content/files/160dae310bf8c9---82249071335.pdfIn PDF document text
    • https://pikewallis.no/wp-content/plugins/formcraft/file-upload/server/content/files/160d9472f7d61c---45860626847.pdfIn PDF document text
    • http://arebiatours.com/uploads/files/50101698168.pdfIn PDF document text
    • https://tanhoaphat.vn/userfiles/file/82550254366.pdfIn PDF document text
    • http://malagi.pl/user-files/fck/file/mipoxatinolameworuda.pdfIn PDF document text
    • https://educhina.mn/editor/files/39927366827.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/didijoxizo.pdfIn PDF document text
    • https://x-software.cz/data/file/3667922935.pdfIn PDF document text
    • http://aclamerica.com/customers/CMS-IMAGES/file/66886129553.pdfIn PDF document text
    • https://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/ccppqjvkc2cmh3llf23gbqe8ih/dizupisekagegosisowimi.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b78193da520---80384693241.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_off0000d78f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD78F 10608 bytes
SHA-256: 4f2d1df925d8a829515756fba35c84119de11953e575919922b99c6a1e878cd0
font_01_sfnt_off0000efcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000107e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107E1 18040 bytes
SHA-256: 3d8127a0818e8fc41fd556a03089a4a6f7f09c6664f5f2ea0909555336851f23

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