Malicious PDF — malware analysis report

Static analysis result for SHA-256 69ddb325e659aa09…

MALICIOUS

PDF

94.1 KB Created: 2021-09-07 23:07:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 91d5ed03e505703889657aceb99241b1 SHA-1: 8c0c71ffd9e4a18fa6fb7af55351d4716071a2d2 SHA-256: 69ddb325e659aa0901520623ae5a1f01341c6b857fca2ec5fd58893efe38502c
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links, many pointing to domains that appear to be compromised or used for hosting malicious content, as indicated by the 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics. The ML classifier and ClamAV also flagged this PDF as malicious, suggesting it is part of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9897

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 http://mrtowing.ca/Lawyers/userfiles/file/kojajitebogu.pdf In PDF document text
    • https://stewsites.com/wp-content/plugins/super-forms/uploads/php/files/08e113e00e81785f9861f77da16f49b0/degumov.pdfIn PDF document text
    • http://wahiclassof69.com/clients/874294/File/jigipo.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b22666ac1fa---88479842141.pdfIn PDF document text
    • http://nesthomes.in/userfiles/file/firelumekaxupizesiriru.pdfIn PDF document text
    • http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fc40595c7a---20610880321.pdfIn PDF document text
    • http://damoorefamilyreunion.com/clients/7/71/71c8bb141a0941b69292984b9770a174/File/63872987348.pdfIn PDF document text
    • http://extreamtuning.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160afde630f8aa---duwege.pdfIn PDF document text
    • http://virus-safe-zone.com/ckupload/files/23844344432.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/16083f25b9eb06---39975438191.pdfIn PDF document text
    • http://volareinmongolfiera.it/userfiles/files/godasadobubuxulomapoveg.pdfIn PDF document text
    • https://phase1acoustics.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a9964efd77---78419175485.pdfIn PDF document text
    • https://www.etbsupplies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160743bb801fd0---rijopoxubis.pdfIn PDF document text
    • http://dok-vo.ru/userfiles/file/mesososex.pdfIn PDF document text
    • http://yamamatoen-wanwan.jp/ckfinder/userfiles/files/47568846409.pdfIn PDF document text
    • https://www.unicodesystems.com/wp-content/plugins/super-forms/uploads/php/files/p5s5a9q19u8krgbt3u9dnivud0/62979772564.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb4ed7eda88---duwiri.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/9i2lmb2m7kcb05me4u64pio6d1/girudelajulapuva.pdfIn PDF document text
    • http://korean-school.hu/hangul/userfiles/file/69258752968.pdfIn PDF document text
    • https://linhquan-group.com/upload/ck/files/70119735683.pdfIn PDF document text
    • http://aktifithalat.com/resimlerfiles/67753082364.pdfIn PDF document text
    • https://tkpmission.org/wp-content/plugins/formcraft/file-upload/server/content/files/16102dd6966c2b---70477589654.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e46b0ca2b9---xiroxifutipade.pdfIn PDF document text
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/43473833863.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160949f32c962d---91313135425.pdfIn PDF document text
    • http://thietbikhachsanvinhhung1.com/upload/files/jabizojuvabap.pdfIn PDF document text
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/f3b817d650a7ac948f17bba8476baaa2/34095688361.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=ncert+solution+of+class+8+maths+pdfPDF link annotation
    • 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_off0001090b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1090B 18092 bytes
SHA-256: 44119990619fe8078bb6c031e7975476d5b6d3cefcb66e733bad0177700bcd86
font_01_sfnt_off0001383c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1383C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015053.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15053 11172 bytes
SHA-256: cbaec1882df2e018f43ec66c84e52b6eabfc0910321110511c1f84b4b82e80e2