Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf8179e38e6f6f8…

MALICIOUS

PDF

78.6 KB Created: 2021-09-03 19:21:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 890cc1095fbb54ba3e2dafa911bffb21 SHA-1: f1c2b2920dc71855bbe4710730d114dbfc70c6fe SHA-256: daf8179e38e6f6f855d31e7a5928a5ef369d8bc6fdab4c23db8a0531a7893839
164 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The sample is a PDF document containing JavaScript that triggers external URI actions. Heuristics indicate it's a link farm pointing to compromised WordPress upload storage and disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 7

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080e6bb5856b---pebagibusugavalir.pdf In PDF document text
    • http://karimeh.com/public/userfiles/file/nepejedaxowewusibejoz.pdfIn PDF document text
    • https://goooinggroup.com/userfiles/files/20210828_032807.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/2339003bf018d70290bee37eb0c6084a/nunemijafa.pdfIn PDF document text
    • http://gasthaus-steinkirchen.de/img/editor/file/96854112775.pdfIn PDF document text
    • https://virtualpulse.eu/UserFiles/file/36821084086.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084293fb9b3a---97414558546.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/77524288148.pdfIn PDF document text
    • http://lisahyatthealth.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adc6024972a---69833510698.pdfIn PDF document text
    • https://hamzsabegi60szallo.hu/UserFiles/File/79353680880.pdfIn PDF document text
    • http://print-printonline.com/ckfinder/userfiles/files/bomelejufowadi.pdfIn PDF document text
    • https://pasarangroup1.com/contents//files/donodenesenevufivep.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/61520182129.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/wigovinukur.pdfIn PDF document text
    • https://gresathouse.com/wp-content/plugins/super-forms/uploads/php/files/e66944de07ef366b4c91fa15d1ec1a3b/75476935095.pdfIn PDF document text
    • https://nceptionsolutions.com/wp-content/plugins/super-forms/uploads/php/files/2e7a50e4f8cfce221d200b8f14c19ba1/bixenapezu.pdfIn PDF document text
    • https://amitadevnani.com/userfiles/file/nematebenejajotomivonar.pdfIn PDF document text
    • https://voicelux.ru/wp-content/plugins/super-forms/uploads/php/files/820bf6325d9e26ed9c60e3fe992ac9e2/99767104611.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/df617c096422a237280869f0ed7f83f3/66070188517.pdfIn PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/8543781684.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/i23vltsp37v7djjnpav4h6hu34/14718627705.pdfIn PDF document text
    • https://www.hit-education.com/wp-content/plugins/super-forms/uploads/php/files/00bn4v2p2m79cuqs50for4r9b6/tepaxoferotulodudog.pdfIn PDF document text
    • https://alphacleanwashing.com/wp-content/plugins/super-forms/uploads/php/files/928f60b69881b2eac9bd97284097dd50/lalena.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=inferring+worksheets+grade+6PDF 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_off0000d035.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD035 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e847.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE847 16960 bytes
SHA-256: 07bba80f3b5cb3e28a67854e949194cbf4691dc614d36170d131b341a0d7bec6
font_02_sfnt_off000113c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113C4 10884 bytes
SHA-256: c4a1208f99ab72eaa75456d7cd59a881ac073bf962bd73183e8b773f5b06e3d5

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