Malicious PDF — malware analysis report

Static analysis result for SHA-256 93697617cea2f78c…

MALICIOUS

PDF

79.8 KB Created: 2021-09-06 05:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 9a554840be9f65e25d5deafaa24af3d8 SHA-1: ec34597a79691b4673a612faff016ff16026eae3 SHA-256: 93697617cea2f78c32228629f9e6d26db28b00fccf63db710ff89e7b1f2de5a1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is often used to redirect users to malicious sites or download further payloads. Several heuristics indicate the PDF is part of a link farm hosted on compromised WordPress sites, suggesting an attempt to distribute malware or phish for credentials. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9833

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/ki1mu256k6gn17p2f1l1suiecm/deradoxo.pdf In PDF document text
    • https://www.sir.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607408c49d77e---nalatizeb.pdfIn PDF document text
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160fdcc7993249---30048699169.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/16119a63158018---44320253996.pdfIn PDF document text
    • http://myshopgroup.com/userfiles/files/11783492566.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/kollmn0mms3umk321gsvpa33b1/tuwirezefeloliwafoweperor.pdfIn PDF document text
    • http://nfc.soo.jp/file/kemimatenurelilil.pdfIn PDF document text
    • https://gamaconsultores.cl/upload/file/72377697033.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/160c07440d04b5---ligape.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160b92ad505ae1---57808320477.pdfIn PDF document text
    • http://dienlanhtruongson.com/upload/files/vodafaso.pdfIn PDF document text
    • https://rumahbaruku.com/contents//files/nasowulofimuzap.pdfIn PDF document text
    • http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/1qe4bjqvqqjnlhbbs5lsum25g1/piwosibitagiwewi.pdfIn PDF document text
    • https://newchat.xyz/js/ckfinder/userfiles/files/fazurajovovepidemuxewew.pdfIn PDF document text
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b26b9c7145---88952605049.pdfIn PDF document text
    • http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160717d9733ff2---wuzog.pdfIn PDF document text
    • http://www.tomasjelinek.com/img/pub/file/2797275538.pdfIn PDF document text
    • http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/160883bb79c21f---jejonovuregijobe.pdfIn PDF document text
    • http://meruzhankhachatryan.com/app/webroot/files/file/rapefawogutuxe.pdfIn PDF document text
    • http://pulsrmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088c89a2be49---fepumasadevokefupoxop.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b33cfbc722---wanunanakulumuregera.pdfIn PDF document text
    • http://taketty.xyz/js/ckfinder/userfiles/files/74775194114.pdfIn PDF document text
    • https://moraure.net/js/ckfinder/userfiles/files/kesovolovosodujuvalu.pdfIn PDF document text
    • http://gyogytornasziget.hu/uploads/files/63103214050.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbca0b89f3---98230955331.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/f2s4h2llogq3i41t05l4bdat44/21057704593.pdfIn PDF document text
    • http://lightofislamonair.org/uploads/files/52293341409.pdfIn PDF document text
    • http://aaaexpressheating.com/userfiles/file/kuderixede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=dota+2+concept+art+book+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_off0000ceff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCEFF 10660 bytes
SHA-256: 42c2e077db1188619d5a000c8cbb825e4c9cdcdbe2533350c3fa27df2387fba6
font_01_sfnt_off0000e768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE768 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF7A 19212 bytes
SHA-256: 2e9f054990c6c0622d1cb3fbba393563746f1d034916990cf0f3819cdc62ef14

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