Malicious PDF — malware analysis report

Static analysis result for SHA-256 656bc9d90b1a2bb9…

MALICIOUS

PDF

79.4 KB Created: 2021-10-09 02:09:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: e5436cabaefb657dff0a9f44a54ebe85 SHA-1: bd517991f1c5c28b0f3df5061304eb79e5f51c94 SHA-256: 656bc9d90b1a2bb911536493d53843bf6141f24adebbab07e971001a219886a6
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and a high number of external links, many pointing to disposable domains, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to redirect users to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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://chcial.ru/uplcv?utm_term=how+many+taylor+swift+albums+are+there PDF link annotation
    • https://bc2000.order-pro.com/ckfinder/userfiles/files/doxodunanisafoguzugugifab.pdfIn PDF document text
    • http://i-p-p-c.com/ckfinder/userfiles/files/57230219673.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/zabinekemegokuwikasa.pdfIn PDF document text
    • https://www.vigo.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/161434476df81a---gunaxanol.pdfIn PDF document text
    • http://gzwep.com/img/file/2021918145026.pdfIn PDF document text
    • http://steelfurniturecn.com/d/files/senono.pdfIn PDF document text
    • https://apotekatia.ba/fajlovi/79260823858.pdfIn PDF document text
    • http://smalternatywa.pl/media/upload/files/d0449ef31d6fb3bbe12e679bdb0db5ed.pdfIn PDF document text
    • http://www.toptehnik.si/images/18716731708.pdfIn PDF document text
    • https://idea-web.ro/app/webroot/files/userfiles/files/dawejupigasotorajugoxofo.pdfIn PDF document text
    • http://nowator-zpu.pl/userfiles/file/68195999060.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/xudenupetejusidivubisuz.pdfIn PDF document text
    • http://metall-press.ru/files/derosevafa.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/79096410440.pdfIn PDF document text
    • http://fortwashington.abwingsmd.com/uploads/files/1242925066.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/0555b8f91b3ea614b702720181eacd77/28378048807.pdfIn PDF document text
    • http://afghansolar.com/userfiles/file/xijaselefowatosuvu.pdfIn PDF document text
    • http://doktor-okonski.pl/uploadimg/file/80430596330.pdfIn PDF document text
    • https://kede.org/userfiles/file/mozunajimonarupi.pdfIn PDF document text
    • http://aasghsflqsae.handylover.com/upload/files/fevowixof.pdfIn PDF document text
    • http://xedaptheduc.net/app/webroot/uploads/files/92719464837.pdfIn PDF document text
    • https://www.assessment.unibe.ch/app/webroot/js/ckfinder/userfiles/files/98291145567.pdfIn PDF document text
    • 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_off0000cc27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC27 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e439.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE439 18832 bytes
SHA-256: eec16e5561b6fc3b45da345ca88d20c1450d0c2452fb1388a9fe0f2f23058d8c
font_02_sfnt_off00011512.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11512 10908 bytes
SHA-256: 1dcfbe2de68d69dd25b3cca00e5162930c82a70b9860017d924d0265b99bdd9b

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