Malicious PDF — malware analysis report

Static analysis result for SHA-256 95eae713ad6d98aa…

MALICIOUS

PDF

82.0 KB Created: 2021-09-18 22:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23
MD5: 9708f95fb284f035d3722a2681674404 SHA-1: f78e5e0d0baef16e046ee2c9fd197855521c0019 SHA-256: 95eae713ad6d98aa51f93f0a7c3ec9f9dbc6710aa6a8fc9087b8c66b6c087a07
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to disposable domains and are likely used for phishing or to host further malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to malicious sites, aligning with spearphishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9797

Heuristics 5

  • 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.
  • 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://archism.ru/uplcv?utm_term=boom+beach+nulls PDF link annotation
    • http://seattleteriyaki3.com/uploads/files/nubegenekifuxe.pdfIn PDF document text
    • https://newegys.egyseg.eu/ckfinder/userfiles/files/79503152384.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210906205402.pdfIn PDF document text
    • https://akemi.ro/hirek/file/pabilebatemawudivikuvovat.pdfIn PDF document text
    • https://robertbah.si/files/file/99091469481.pdfIn PDF document text
    • http://progettarecasa.com/userfiles/files/68892902541.pdfIn PDF document text
    • http://coutleelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vobapa.pdfIn PDF document text
    • http://viettranslators.com/webroot/img/files/jixezulubagudo.pdfIn PDF document text
    • https://advance-pack.com/editor_upload/file/pabuxivuwaton.pdfIn PDF document text
    • http://loaamtran.com/files/usersfiles/files/mikat.pdfIn PDF document text
    • http://tcihk.com/userfiles/36632626470.pdfIn PDF document text
    • http://bebelino.ru/userfiles/file/31580695878.pdfIn PDF document text
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/161421fee8c731---62455696396.pdfIn PDF document text
    • https://hnhaa.com/userfiles/tnejp/files/76383173483.pdfIn PDF document text
    • https://yp05.com/_UploadFile/Images/file/puforidex.pdfIn PDF document text
    • http://brbud.pl/userfiles/file/kabixulegakirudunusowew.pdfIn PDF document text
    • https://keongracun.org/contents/files/faripugofekafumisuzi.pdfIn PDF document text
    • https://akrmedia.no/ckfinder/userfiles/files/70241313621.pdfIn PDF document text
    • http://residencecarlofelice.com/userfiles/files/97696254556.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/xotex.pdfIn PDF document text
    • https://precisionautoandac.com/wp-content/plugins/super-forms/uploads/php/files/b31d6f3cd005bbfa34f1e64aef54d135/ladonuviduvenugijovudoruw.pdfIn PDF document text
    • http://dedanskecasinoer.dk/userfiles/file/12103514123.pdfIn PDF document text
    • https://hse.tw/upload/file/91766217758.pdfIn PDF document text
    • https://xn--pssa17sw71b.tw/upimages/files/legutet.pdfIn PDF document text
    • http://1utilaje.ro/mm/file/zavesip.pdfIn PDF document text
    • https://lapdonline.org/file/6206166221.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c457.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC457 17044 bytes
SHA-256: 98d442511af24c1f88592400fd7f531efb964a7bd2b29e404776d2f11229f916
font_01_sfnt_off0000f0a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A6 16840 bytes
SHA-256: 637f282a09958e0217b626fc4698b4d72005eb4dad7007e6f209d5e5c10a4ef2
font_02_sfnt_off000108ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108EC 10500 bytes
SHA-256: 78afb1228381d823acbfc4adc811eaf1daa70103b0f828a49f8aa16b55472a0d
font_03_sfnt_off000120a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120A6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1