Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4697fab05416d1a…

MALICIOUS

PDF

89.3 KB Created: 2021-09-04 23:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 1f47a37e82c1bdb866ac00b058d46014 SHA-1: d7823db161a2e1b561f5605450611fc271ad057f SHA-256: b4697fab05416d1acadba0d762ccf8911a6e3ba36792aa6ae4fd6dc244b87f80
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external links, many pointing to compromised WordPress sites or disposable hosting, suggesting a link farm or phishing lure. The presence of these links indicates an attempt to redirect the user to potentially malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

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
  • 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.
  • 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://krisoc.ru/uplcv?utm_term=manualidades+navide%C3%B1as+paso+a+paso+de+papel PDF link annotation
    • https://mzlpro.com/web/img/podborky/files/fotanuvurakarafe.pdfIn PDF document text
    • https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/f5d42a50ba3ec346c4388a45ba6f3e95/zivibire.pdfIn PDF document text
    • http://franciscakeryandcatering.com/clients/61981/File/60293026552.pdfIn PDF document text
    • http://ebsenglish.net/_UploadFile/Images/file/tevutinirovawofaruvo.pdfIn PDF document text
    • https://anzmrrn.org/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbaf915706---fuvudupenovu.pdfIn PDF document text
    • http://vswet.ru/f/42895383711.pdfIn PDF document text
    • https://www.alpha-dynamics.gr/wp-content/plugins/formcraft/file-upload/server/content/files/160baefc1b10a6---25115170979.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/733b480193a04242e94274c0572daa45/51530176219.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ec6d75758c---17287338132.pdfIn PDF document text
    • https://idd.no/ckfinder/userfiles/files/walapa.pdfIn PDF document text
    • http://intechsol.kz/wp-content/plugins/formcraft/file-upload/server/content/files/1606f64010a1cc---fuvitetebokiworavi.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfec3d43f13---13940948003.pdfIn PDF document text
    • https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/160d4e3af18e92---renokamolabe.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/bumazovukuzazelalerob.pdfIn PDF document text
    • https://www.federatedlighting.com/wp-content/plugins/super-forms/uploads/php/files/939196eac079d21321164ead93daf2d1/xerazoduruwipovagabezuv.pdfIn PDF document text
    • https://pabrikangka.com/contents//files/zikipisafubonejik.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/31081912581.pdfIn PDF document text
    • http://nfc.soo.jp/file/6316237315.pdfIn PDF document text
    • http://aj-freight.com/ckfinder/userfiles/files/92569326472.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087c4bc6f2b1---zutogojabobob.pdfIn PDF document text
    • http://qiangka.com/ckfinder/userfiles/files/jufazugarijufefumi.pdfIn PDF document text
    • http://lesbambousbleus.fr/ckeditor/upload/files/wivexetulu.pdfIn PDF document text
    • http://myucmas.com/userfiles/file/lilatelav.pdfIn PDF document text
    • https://cvssteelex.com/ckfinder/userfiles/files/31700834327.pdfIn PDF document text
    • https://preprodpcb.com/userfiles/files/54956246126.pdfIn PDF document text
    • https://inifd.london/uploads/file/67005172680.pdfIn PDF document text
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/61ad0f83443cedf6b36e45345d3a8e81/sadogubowo.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_off0000f3ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3ED 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010bff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BFF 19044 bytes
SHA-256: 40d2a0967a38bb0da818d58dd58c8098f5e040816a5e296db13a8a08c35c83b0
font_02_sfnt_off00013cac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CAC 10552 bytes
SHA-256: d43328f0653d4d8c6b67cb0593f48c8460eabbe70f933844362086b2927c50b2

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