Malicious PDF — malware analysis report

Static analysis result for SHA-256 2a54d225b2d489ad…

MALICIOUS

PDF

83.5 KB Created: 2021-09-17 08:43:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: fe9f5d7e5cf7d9b97a1de7d90cb9d591 SHA-1: 05be9fcbf279a8647cbf47ad620b104332ad2bc9 SHA-256: 2a54d225b2d489ad127efbc0612341da752918f354f48d60ad7149d18a974cf9
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. It contains numerous links, many pointing to potentially compromised CMS upload directories or disposable hosting, suggesting a link farm designed to redirect users. The presence of external URIs and link farms indicates an attempt to direct users to malicious or compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9972

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.ccs-corporation.com/ckfinder/userfiles/files/xawawotifilagoludere.pdf In PDF document text
    • https://dedywiredja.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142494500c4a---96183584207.pdfIn PDF document text
    • http://xn--brneneskontor-landsforening-b0c.dk/userfiles/file/34315378860.pdfIn PDF document text
    • https://www.lokalesichtbarkeit.de/wp-content/plugins/super-forms/uploads/php/files/lf1kl3nms9o12jd661n79oskva/53335872318.pdfIn PDF document text
    • http://bigbulkbags.ahmadpackages.com/survey/userfiles/files/ronimexasavatanod.pdfIn PDF document text
    • https://foundationkuzmanov.com/files/zozukurijizi.pdfIn PDF document text
    • http://chuaphucluong.com/uploads/image/files/73504111680.pdfIn PDF document text
    • http://dolphinegypt.net/userfiles/file/talepak.pdfIn PDF document text
    • http://otczenacts.com/media/files/togowiriximizave.pdfIn PDF document text
    • http://kanchanaspa.com/ckfinder/userfiles/files/54488241282.pdfIn PDF document text
    • http://tz5168.com/uploadfile/image/2021/09/03/file/20210903_121114_127.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/mosunilowa.pdfIn PDF document text
    • http://joltiy.ru/uploads/files/1093531789.pdfIn PDF document text
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1613c68c199176---patejalezaseworifenol.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/nojid.pdfIn PDF document text
    • https://delaneyllc.cfonewsletter.com/ckfinder/userfiles/files/melufelosozivajuvisoz.pdfIn PDF document text
    • http://sevenseahotel.com/uploads/images/files/rozigiti.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/lesirakugibolemejefoni.pdfIn PDF document text
    • http://chaitraglaze.com/uploads/47651005420.pdfIn PDF document text
    • https://konteshamamotu.com/userfiles/file/27147779947.pdfIn PDF document text
    • https://diversifiedhumansolutions.com/wp-content/plugins/super-forms/uploads/php/files/1302aa0096c20dffdafa459b09dca1bc/20428963085.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=amazing+spider+man+full+movie+in+englishPDF 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_off0000dda2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDA2 18992 bytes
SHA-256: 519dc835f1ab99244bbb5c29529789a9f013b0d24ee37643a9dbf390f4592472
font_01_sfnt_off00010f32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012749.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12749 11056 bytes
SHA-256: 71cbe0d1ca96cf425ad9a964de749873838932765e4ce5e4f70a3f62da1b1bf7