Malicious PDF — malware analysis report

Static analysis result for SHA-256 308c194a37d40eef…

MALICIOUS

PDF

84.7 KB Created: 2021-09-06 00:51:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: fb9cd7d42916aea5f490a238106138e9 SHA-1: 9bc69ee74a3708ba35881fab364455440f1fc1b1 SHA-256: 308c194a37d40eefa204ba98a0d6c4dbae4839edd0130457f9ebed6257471e40
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics as malicious, including a ClamAV detection for 'Pdf.Phishing.Trojan'. It contains numerous links pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness. The primary attack pattern involves directing users to external, potentially compromised, websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9860

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://thuaphatlailongthanh.com/upload/contentFile/minhchau/file/36718223234.pdf In PDF document text
    • https://detskeihriska.eu/ckfinder/userfiles/files/19061181592.pdfIn PDF document text
    • https://magerp.org/upload/files/bilirodetokotisazivaxobi.pdfIn PDF document text
    • https://mecaniquekd.ca/upload/file/lajonizurizinukezikok.pdfIn PDF document text
    • http://www.deadclan.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076f6dcf39c0---87019434798.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/3d19911b76eb00f7d06bc19167a0701d/81944735097.pdfIn PDF document text
    • http://www.myhhsi.com/wp-content/plugins/super-forms/uploads/php/files/0cf4984c4bd90dbc41dcf2dc46903a23/25083093559.pdfIn PDF document text
    • http://xn----7sbbgprpk7biiq.xn--p1ai/admin/ckfinder/userfiles/files/nanawuxedusibavojak.pdfIn PDF document text
    • https://www.paseppe.gr/ckfinder/userfiles/files/wowimuputixizutimilosemol.pdfIn PDF document text
    • http://chipublichouse.com/ckfinder/userfiles/files/vaxemejurumofakoloxo.pdfIn PDF document text
    • http://batiment-tunisie.com/userfiles/file/6580795463.pdfIn PDF document text
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1606c921cd3701---rawowomolaje.pdfIn PDF document text
    • https://pharma-tools.eu/galeria/file/93647794831.pdfIn PDF document text
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/3534f735e85d19b4140bf97e429b6d44/92272355014.pdfIn PDF document text
    • https://bselink.com/userfiles/file/gisonuvanubigubejuzusix.pdfIn PDF document text
    • http://allnatureint.com/userfiles/file/kurajovopemugo.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/sonagosemumaji.pdfIn PDF document text
    • http://www.atccs3.it/atccs3/fckeditor/editor/ckfinder/userfiles/files/49201890386.pdfIn PDF document text
    • http://www.guaitoli.eng.br/wp-content/plugins/formcraft/file-upload/server/content/files/16084affa28679---66805580164.pdfIn PDF document text
    • https://ventana-sur.com/wp-content/plugins/formcraft/file-upload/server/content/files/16071867717b03.pdfIn PDF document text
    • http://accessprecision.com/userfiles/file/bezoda.pdfIn PDF document text
    • http://retco.ge/ckfinder/userfiles/files/22285465585.pdfIn PDF document text
    • https://www.avantagesapp.com/uploads/files/26332453128.pdfIn PDF document text
    • https://baxsporthorses.nl/userfiles/file/21548736856.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160707703ad397---10167901535.pdfIn PDF document text
    • http://xn--12cm8caae5d9a0a0a1dxk6dd.com/user_img/files/14006411048.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=jet+of+blood+artaud+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_off0000e6dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6DD 10360 bytes
SHA-256: d9e08bb5dd486d87aa4c3fe41a11bf51b3607ce611f7597d5173a0e7d95ed188
font_01_sfnt_off0000fe31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE31 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11643 18380 bytes
SHA-256: 8acaab638a8aab345945f844927db8a926c7dc051f7a96530345e0233e9279a8

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