Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b7f6db40064995f…

MALICIOUS

PDF

77.3 KB Created: 2021-09-04 06:08:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: fb60ecf5637f49462eddc5642c122764 SHA-1: 7e47919e9fa43b0ade2e85fb623eea6b945b0772 SHA-256: 0b7f6db40064995f91ee8eca45b62f9e737176c44dfb717ede3570de34b11242
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a significant number of external URIs and link farms, with several pointing to compromised CMS uploads and disposable hosting, indicating a phishing or redirection attempt. While no scripts were explicitly extracted, the PDF structure and heuristics suggest it's designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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://copelandreunionla.com/clients/6/66/66f6f3de7053633686652f51c4c00696/File/nokafuwaxovizesugo.pdf In PDF document text
    • http://benevolo.it/userfiles/files/47287168315.pdfIn PDF document text
    • https://drainscovers.com/wp-content/plugins/super-forms/uploads/php/files/89a25b0c8363954a2bc101d546666848/zumosed.pdfIn PDF document text
    • http://kidneytracker.com/ckfinder/userfiles/files/2031036023.pdfIn PDF document text
    • http://altaprecision.com/userfiles/file/27286715758.pdfIn PDF document text
    • http://anthonyvienna.com/sites/default/files/file/finev.pdfIn PDF document text
    • http://www.publicitymailing.ie/wp-content/plugins/formcraft/file-upload/server/content/files/160a0bc9ca0b91---92771702411.pdfIn PDF document text
    • https://bayardplaza.co.uk/wp-content/plugins/super-forms/uploads/php/files/tq28vrbmj95u9403quaeervmus/fugufef.pdfIn PDF document text
    • https://inchirieriavioane.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a2dc2cd0480---41354297167.pdfIn PDF document text
    • http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/35174026209.pdfIn PDF document text
    • http://www.drop-lok.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074847bac8fb---22385294594.pdfIn PDF document text
    • https://puertoestereo.com/wp-content/plugins/super-forms/uploads/php/files/eqa9kco605ucbfmog0bu883v7e/40336989692.pdfIn PDF document text
    • http://www.onekaddy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee9b62763c---19539757238.pdfIn PDF document text
    • https://mimpishio2bet.net/contents//files/85926421980.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/56625302109.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609008fc3840b---9061100136.pdfIn PDF document text
    • http://erisalaw-chicago.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/92055042778.pdfIn PDF document text
    • http://sieuthihatgiong.vn/webroot/img/files/rutiwumipiwon.pdfIn PDF document text
    • http://mutitar.com/user_img/files/80640195901.pdfIn PDF document text
    • http://iweldbot.com/ckfinder/pho/files/jikopusuj.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/bfa52a1452a19fc29571ba7e0a885408/wadajaxililepi.pdfIn PDF document text
    • https://www.elshandmadedesign.nl/ckfinder/userfiles/files/zomonin.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/160823562b09fc---95602562191.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=head+and+neck+cancer+staging+2018+pdfPDF 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_off0000c7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC7CE 11216 bytes
SHA-256: 36ce976dc701ccd03f2af5d1fa476fbe4ce518c35349f70c7bf069b4dab7740c
font_01_sfnt_off0000e205.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE205 17456 bytes
SHA-256: 20031f237501614b083a63545764ad7bdd09099c6352fe79bbad7ec81a94c763
font_02_sfnt_off00010f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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