Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b9cc02d9d3d68ee…

MALICIOUS

PDF

74.8 KB Created: 2021-09-15 17:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 48206363c07ebe4c5aee9550526218ed SHA-1: cbe35d1c933dbd47249441b07a46ab2f5d2c2549 SHA-256: 8b9cc02d9d3d68ee63687fdb8c2e97feb338b2f2679af0701e373988eade3724
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests a tactic to obscure malicious links within a large number of disposable domains. The ML classifier and ClamAV detection strongly support a malicious verdict, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://laborke.ru/uplcv?utm_term=how+to+reset+my+phone+battery PDF link annotation
    • http://liubeauty.com/luutru/files/34739190017.pdfIn PDF document text
    • https://functionalmovement.gr/wp-content/plugins/super-forms/uploads/php/files/8911386663ce60db63eded8c64bf0d42/77542937403.pdfIn PDF document text
    • https://warungmimpishio.com/contents/files/78959989770.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/kapopunulodagokuna.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/tanubitubomuralanarixo.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/galuzosuramogovufokajikim.pdfIn PDF document text
    • https://korovin.org/site/img_ufiles/raxibunumiwobig.pdfIn PDF document text
    • http://ersatzmonitor.de/userfiles/file/mijisotukek.pdfIn PDF document text
    • https://www.artikel238.nl/emmwebbit/resources/ckfinder/userfiles/files/49518213362.pdfIn PDF document text
    • https://renault-service.com/userfiles/77473414951.pdfIn PDF document text
    • http://idevicesplus.nl/app/webroot/files/userfiles/files/28892503435.pdfIn PDF document text
    • http://kwartetproforma.com/userfiles/file/94565880960.pdfIn PDF document text
    • http://www.martiusstaden.org.br/js/ckfinder/userfiles/files/lixojibijun.pdfIn PDF document text
    • http://afro-safari.com/upload/files/74999784047.pdfIn PDF document text
    • https://keralatemples.info/ckfinder/userfiles/files/majixojikemuzagobewawaxur.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/bipenigodukog.pdfIn PDF document text
    • http://www.greenfield-sustainability.com/images/files/68458807917.pdfIn PDF document text
    • http://wignaccent.com/FCKeditor_2.6.3/userimages/file/20210902211712.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/79612799302.pdfIn PDF document text
    • https://bonekarusa.com/contents/files/duzugu.pdfIn PDF document text
    • http://grgct.com/ckfinder/userfiles/files/67609986311.pdfIn PDF document text
    • http://thewellmanteam.com/userfiles/files/sanir.pdfIn PDF document text
    • http://thegoshow.net/userfiles/file/tugezitabegewasomobid.pdfIn PDF document text
    • http://tele-klass.ru/i/upload/files/nawurokamulazulodamixipe.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_off0000c301.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC301 16320 bytes
SHA-256: faa838362923cba596b7ada9a43b2cd1fb9ccc00029a9cafc85b7e768759e762
font_01_sfnt_off0000ecdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECDF 10712 bytes
SHA-256: a76542d459d5008bef54c48d58d949510ba99976733563dd6bc43ee0c98b4d73
font_02_sfnt_off00010521.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10521 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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