Malicious PDF — malware analysis report

Static analysis result for SHA-256 403ce7d5a6206606…

MALICIOUS

PDF

77.8 KB Created: 2021-09-05 11:59:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: fac4d06576a59bfcf9621a6aa7cc353b SHA-1: 884102cc801b7ac1b7836af617f6dd04fe75e440 SHA-256: 403ce7d5a6206606884c0c269235d8bbffd058274516c9c9fe2ebe422798657d
156 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The heuristics reveal a link farm pointing to compromised CMS upload storage and disposable hosting, suggesting a phishing or malware distribution scheme. The embedded URLs, while some are marked benign, are part of a larger pattern of suspicious link aggregation within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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://betonwerkendejonge.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160892cb67670a---99854570415.pdf In PDF document text
    • http://guides2alpes.org/uploads/file/48410692850.pdfIn PDF document text
    • http://lexen.ca/userfiles/files/36682108018.pdfIn PDF document text
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/pmjjf1gkqe598om1i9p029osj0/pofofamunalolafitisuzasig.pdfIn PDF document text
    • http://lab4050.com/upload/editor/file/91555212105.pdfIn PDF document text
    • https://legouic-peinture.fr/userfiles/file/33961372893.pdfIn PDF document text
    • http://radiosalsa.fr/php/rs/filesupload/file/wejukowazufu.pdfIn PDF document text
    • http://pocatellocampfire.com/wp-content/plugins/super-forms/uploads/php/files/9uotvi6f4k1n8i1nnnp5dsi2ce/27233003347.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a06c952af66---15501087894.pdfIn PDF document text
    • http://cgemfoco.com.br/ckfinder/userfiles/files/41538962177.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/69993694392.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c88e2b3a1a---5992746114.pdfIn PDF document text
    • http://artechq8.com/beta/uploads/files/rojufezasanaluporomovin.pdfIn PDF document text
    • https://campermagazine.tv/public/file/tokowaloduvakop.pdfIn PDF document text
    • http://austria-ex.com/images/blog//file/zogivuweperixob.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/e287ee4f9ade86940e96c0b74638d82f/jiwuxibikikodawamamiroko.pdfIn PDF document text
    • http://seasonsblinds.com/uploads/ckfinder/userfiles/files/18572031264.pdfIn PDF document text
    • https://agrimal.pl/userfiles/file/74665541485.pdfIn PDF document text
    • https://arab-hams.com/Ups/files/30982498283.pdfIn PDF document text
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/c5pdofrc94blnojg9j2sldtof9/wakutufugevuvajakofividaw.pdfIn PDF document text
    • https://backcountryplayground.com/wp-content/plugins/super-forms/uploads/php/files/7d6d7cfe0e1024a8d3214f2eae5237a4/punuzixitizijedalekeba.pdfIn PDF document text
    • http://www.tiande-global.com/ckfinder/userfiles/files/19265107527.pdfIn PDF document text
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/q1l7cfo700lqua0fq4mjn8q644/pewazekigimuderijemor.pdfIn PDF document text
    • http://coiffurenais.com/userfiles/file/82836727773.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607729c579483---fifobupozeno.pdfIn PDF document text
    • http://herfon-machinery.com/images/ckfinder/files/20210810222720.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/6naE_Nh8_CY/uplcv?utm_term=vaughn+vernon+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_off0000c87d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC87D 10508 bytes
SHA-256: d4dbe27f34f3d6cc71c3cac39e6b7384cbf5fd073a65cff82a985699f170361b
font_01_sfnt_off0000e016.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE016 19032 bytes
SHA-256: 13d3119e57d22a634413a211ec49a4c2ac1afdc1293d2ba556002760c3a72d94
font_02_sfnt_off00011158.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11158 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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