Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d60aadce6837a55…

MALICIOUS

PDF

79.5 KB Created: 2021-09-11 23:00:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a2f3b87e7966251ac4b6ce9d6181a727 SHA-1: b6c54a5b8c696fbcdcb3785b9ce7e7845c667165 SHA-256: 3d60aadce6837a5520450ed3096c34e7a1e98cd50a1f74b27e75d56cded9b051
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file functions as a link farm, containing numerous URLs pointing to potentially compromised websites or disposable hosting. These links are likely intended to lure users to phishing sites or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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=how+to+connect+bluetooth+headset+with+android+phone PDF link annotation
    • https://es21sys.com/userfiles/file/30621436016.pdfIn PDF document text
    • http://herve-coiffure.ci/files/mubizapupowatetojiketoxe.pdfIn PDF document text
    • http://ez-surveying.com/htdocs/cljr/data/files/64305055650.pdfIn PDF document text
    • https://megacook.pt/site/upload/file/zenibokamufef.pdfIn PDF document text
    • http://lagrupacio.cat/file/96892952916.pdfIn PDF document text
    • https://horgaszvelem.elelmiszer-hazhozszallitas.hu/ckfinder/userfiles/files/dokefakez.pdfIn PDF document text
    • https://snoman.mb.ca/ckfinder/userfiles/files/gukejidefobigexozokeg.pdfIn PDF document text
    • http://sxnqx.org/upload/file/Fl202109020458331792.pdfIn PDF document text
    • http://woodlander.sk/grafika/file/muwasomemopazome.pdfIn PDF document text
    • http://xn--2osv9pt2jfpt.com/uploadfiles/files/pegexeza.pdfIn PDF document text
    • http://www.uc-kushiro.net/images/library/File/80879204428.pdfIn PDF document text
    • http://amtusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a173441e9c---wikaraxiwerawakaruraza.pdfIn PDF document text
    • https://hsiaoying.com/userfiles/file/12164423674.pdfIn PDF document text
    • https://myparrotfood.com/user_files/files/8441425384.pdfIn PDF document text
    • http://supair-lux.hu/ckfinder/userfiles/files/mutajepurelukulugem.pdfIn PDF document text
    • http://sanga.asia/userData/board/file/zowajexokukafizumabamij.pdfIn PDF document text
    • http://flyingkirin.com/uploadfiles/file/020851386163.pdfIn PDF document text
    • http://xn----7sbakn3aoflleitf3m6a.xn--p1ai/userfiles/file/kupebifijuw.pdfIn PDF document text
    • http://www.espaciocultivarte.com/ckfinder/userfiles/files/27848728692.pdfIn PDF document text
    • http://ipvoicenj.com/wp-content/plugins/formcraft/file-upload/server/content/files/161375f19f0c7b---54164057676.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/34400869905.pdfIn PDF document text
    • http://huspanda.com/data/ckfinder/files/52702107644.pdfIn PDF document text
    • http://likebarcode.com/image/files/20210904_073437.pdfIn PDF document text
    • https://bikeid.net/ckfinder/userfiles/files/gazakidigow.pdfIn PDF document text
    • http://www.lifestaralberta.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135214f47f87---kopegipefopuxanav.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_off0000d2da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2DA 17012 bytes
SHA-256: 51bdf86acef117ec75ca98d430e17b785e2a9b5cb3f9b4e9747ebd4612d0fa56
font_01_sfnt_off0000ff3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF3A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011751.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11751 10928 bytes
SHA-256: 04a3895c79c63f196d319efb5553c27b67ff8359185eaf7cff5b5e1acef30844

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