Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2d57e76f3cbe679…

MALICIOUS

PDF

73.3 KB Created: 2021-09-03 20:26:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f31d77883e0b46ccf54f60f7520a3282 SHA-1: bd41d6648ab5c72d336ec80258bd8c52b6cbde02 SHA-256: c2d57e76f3cbe6798622a150f6dadfb6ae2d78c6dd1ccde8339db3319b37c24c
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by a machine learning classifier and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal it functions as a link farm, containing numerous URLs pointing to various websites, many hosted on compromised WordPress installations. The presence of 'utm_term' parameters suggests an attempt to track user engagement, common in phishing or spam campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://www.arphplumbing.co.uk/wp-content/plugins/super-forms/uploads/php/files/qdcpo6577brp5bkk0oeg5moucj/88506896644.pdf In PDF document text
    • https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/3874f810ca31d2944880041e42732de5/wilizowifotok.pdfIn PDF document text
    • http://www.pattyn360.com/upload/forum/files/pewewuvomul.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/0c76ea7126d9bbf2717dfeb4fa2f09db/ruwudimegawori.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/79374976143.pdfIn PDF document text
    • http://caf-ljubljana.si/docs/liwajeraxir.pdfIn PDF document text
    • http://pokebarslo.com/uploads/files/jiduvilagojukironez.pdfIn PDF document text
    • https://masterok-kovka.ru/wp-content/plugins/super-forms/uploads/php/files/b5b30efe91997ede891ae3051723710e/ditigokeser.pdfIn PDF document text
    • http://zovsh.com/Uploadfiles/files/fuvopetep.pdfIn PDF document text
    • https://alutat.com/data/file/wopidadusesomazej.pdfIn PDF document text
    • https://amezdigital.com/wp-content/plugins/super-forms/uploads/php/files/b71ae5492f4ce62b19598b09bce7bd07/79813047359.pdfIn PDF document text
    • http://omegapizza.net/uploads/files/kujepanaxibitav.pdfIn PDF document text
    • https://sitarasign.ir/data/file/rawogupesavosamejos.pdfIn PDF document text
    • https://www.onestopnaturalstore.ca/wp-content/plugins/super-forms/uploads/php/files/t0c7kmoinlofpdadko48spf1gi/bafuf.pdfIn PDF document text
    • http://bowenlawmt.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/43905833217.pdfIn PDF document text
    • http://aaexpansionjoint.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b73bb8e2d6---46227127312.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/nilujisupisiwepo.pdfIn PDF document text
    • https://limmaginebistrot.com/file/20480502218.pdfIn PDF document text
    • http://zcapitalcrm.com/app/webroot/uploads/files/fegik.pdfIn PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kn438jtmhechuuf8db9580r2p0/72622716442.pdfIn PDF document text
    • http://cbelmira.com/wp-content/plugins/super-forms/uploads/php/files/v5j6c95m7roq3eog8ffb3rkpa6/36482074856.pdfIn PDF document text
    • http://vouchertiket.com/airplane/ckeditor/uploads/files/mematatirijofopazowinit.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=consonant+vowel+consonant+words+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_off0000bcc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBCC4 16528 bytes
SHA-256: ba179e22e39034db84566dd2af61faf11a7b493449ee065c6545ef3912b8112c
font_01_sfnt_off0000e6ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6CA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fee1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEE1 10704 bytes
SHA-256: 9c85054636df04a0e4ab146185f355e6d089c9e0759376eff4d3bf9a6a4f4bf7

Open this report in the interactive analyzer, or submit your own file for analysis.