Malicious PDF — malware analysis report

Static analysis result for SHA-256 2949af54ee6ccd3f…

MALICIOUS

PDF

85.5 KB Created: 2021-09-19 11:35:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: c83381c1a6ad46bf1fdfc5859dfbbb76 SHA-1: bc1f98746254e694891e55266ef171c4f58880cb SHA-256: 2949af54ee6ccd3fe8ea84213c68a63478809d0eb94e2db5163f987ef98872c7
156 Risk Score

Malware Insights

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

The PDF contains numerous external URIs and link farms pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. ClamAV detected this file as Pdf.Phishing.Trojan, and ML classification strongly supports maliciousness. The embedded URLs are likely used to lure victims to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://allytemp.ru/uplcv?utm_term=the+red+thread+full+movie+online PDF link annotation
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/somasuzuxate.pdfIn PDF document text
    • https://qualityroofinnandsuites.com/nbloom/fckuploads/file/xilolezidaxozuk.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/waxunig.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613bad03cb24c---kuxisesovulim.pdfIn PDF document text
    • http://gesgo.de/userfiles/file/21472169404.pdfIn PDF document text
    • http://healhumanity.foundation/userfiles/file/95105288313.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/melojipojuxubufakusun.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/84743871029.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/ok2j5sve24cdiuhlbuonmpochj/13934615836.pdfIn PDF document text
    • https://dichocungtoi.com/userfiles/file/kikunuw.pdfIn PDF document text
    • http://nazycakes.com/userfiles/file/34414363043.pdfIn PDF document text
    • http://vititanon.com/user_img/files/wodato.pdfIn PDF document text
    • http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16136ef9154ae7---700777243.pdfIn PDF document text
    • https://self-storage.sg/images/uploadedimages/file/xivivojifofit.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613d03c182f2a---57549893102.pdfIn PDF document text
    • https://learnrkbin.jugalbandiresearch.com/ckfinder/userfiles/files/lulopiruz.pdfIn PDF document text
    • http://bosch-elektronarzedzia.pl/catalog/file/16114242357.pdfIn PDF document text
    • http://aftp.bg/userfiles/file/31941894578.pdfIn PDF document text
    • http://sinoscaform.com/upload/ckimg/files/202109060458529254.pdfIn PDF document text
    • http://yevres.fr/ckfinder/userfiles/files/xipokapagojoguvowo.pdfIn PDF document text
    • http://cheers-gifts.com/userfiles/pukurodixepenatod.pdfIn PDF document text
    • https://artbynela.com/uploads/file/sokizifekopoperam.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_off0000e25d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25D 10580 bytes
SHA-256: a8ce86b87818ed9fce2335951f75ce54e6bdcfce99fb2c485428d8a98da1830b
font_01_sfnt_off0000fa4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA4E 20524 bytes
SHA-256: d7318f1c629af2397d3d4788e23174182f68b0c52bca725f1f7c2fcfff5936fa
font_02_sfnt_off0001306c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1306C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1