Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d786f64a5bc711e…

MALICIOUS

PDF

75.2 KB Created: 2021-09-09 04:21:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 719eff8166b5c8739427fceeb4dd00d5 SHA-1: cb2f941ba499ebbb1505c0d3f9ceda137a7672ba SHA-256: 4d786f64a5bc711e10196ca3204f8c6dced43436134c751fc83ff9d59d3b7101
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a large number of external URIs, many hosted on compromised CMS uploads and disposable domains, indicating a phishing or malware distribution attempt. The embedded JavaScript likely facilitates the redirection to these malicious links, which in turn serve as a lure for users to download further payloads or be directed to phishing sites. ClamAV detection as 'Pdf.Phishing.Trojan' further supports the malicious classification.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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=naruto+rise+of+a+ninja+android+download PDF link annotation
    • http://sieuthimaynhapkhau.com/upload/files/tipodozifawopekup.pdfIn PDF document text
    • http://ciar.vn/uploads/image/files/geforoluzivep.pdfIn PDF document text
    • https://amkboiler.com/wp-content/plugins/super-forms/uploads/php/files/kro3uaqfbutreqv8kbrrindbsa/likewito.pdfIn PDF document text
    • http://life-homeshop.com/asset/uploads/files/kijew.pdfIn PDF document text
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/161381d403c3da---xapukubetujesinon.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1612f2aeab5ffc---6483760061.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/16138e9a66f6c7---27155918517.pdfIn PDF document text
    • http://mikailang.net/userfiles/file/20210908012624_512181530.pdfIn PDF document text
    • http://premiumcsp.com/uploads/files/kujape.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/85183696155.pdfIn PDF document text
    • http://dentalweek.eu/userfiles/files/72662125827.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16138a1f6c1b9b---gifamijiwuturefi.pdfIn PDF document text
    • https://ottopianos.nl/files/16366274977.pdfIn PDF document text
    • https://cicasoftavukatwebsitesi.demowebsiteleri.com/upload/files/setelemol.pdfIn PDF document text
    • http://kondicionery-noginsk.ru/upload_picture/file/lopelivoka.pdfIn PDF document text
    • http://interfacetravels.com/app/webroot/js/ckfinder/userfiles/files/kulapex.pdfIn PDF document text
    • http://bifruit.mk/ckfinder/userfiles/files/45990252617.pdfIn PDF document text
    • http://herbwaterthailand.com/userfiles/files/momuvowofalosupuwagof.pdfIn PDF document text
    • https://yourdentist.ro/app/webroot/files/userfiles/files/gutopisojawilar.pdfIn PDF document text
    • https://easypayindia.in/userfiles/file/vegiremevox.pdfIn PDF document text
    • https://seerupit.dk/assens/file/90069156017.pdfIn PDF document text
    • http://sunmoon-glory.com/web/upload/files/67050742671.pdfIn PDF document text
    • http://chpcentre.com/files/file/livamubotuwete.pdfIn PDF document text
    • http://sbriz.ru/userfiles/file/61590904384.pdfIn PDF document text
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/pejefuxitoxug.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_off0000c012.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC012 10640 bytes
SHA-256: add04b424c9fb8b39c36ec82bfca99683c9990bf311b19275b9fe1c80cbf01d4
font_01_sfnt_off0000d891.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD891 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f0a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0A3 18196 bytes
SHA-256: ebfa5966d2fb24db249935bd605ed2e170f9a029be258ab51a431cfa501944e5

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