Malicious PDF — malware analysis report

Static analysis result for SHA-256 570ec9aa21868d71…

MALICIOUS

PDF

94.6 KB Created: 2021-06-28 08:46:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: ac8524afb3cc17b6d678942429e9ab66 SHA-1: 60e971b549423b616d47aa6e67b7a9caaa3039e3 SHA-256: 570ec9aa21868d71ebc357e20ee48fbfdca894e79b445ad783a3014123c41554
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The file contains numerous links to external websites, many of which are hosted on compromised WordPress installations or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics points towards a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://queure.ru/uplcv?utm_term=how+to+grow+scallions+from+onions PDF link annotation
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/61e52fea4f8c85f8a224fb19bf821027/52236257042.pdfIn PDF document text
    • http://www.blackhillsdancecentre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf914e09e3e---gilozozoriridilasuxi.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/4824617382.pdfIn PDF document text
    • https://kurishupally.org/userfiles/file/51985697249.pdfIn PDF document text
    • http://magendans.com/imagefiles/file/14930557799.pdfIn PDF document text
    • http://grupophi.es/uploads/files/33853912936.pdfIn PDF document text
    • https://event-connections.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608162ff5f521---wilimunoza.pdfIn PDF document text
    • http://immobilieninvestors.de/userfiles/file/pimexizobami.pdfIn PDF document text
    • https://bazab.ru/ckfinder/userfiles/files/91747668968.pdfIn PDF document text
    • https://idfusionllc.com/wp-content/plugins/super-forms/uploads/php/files/1fccb7abd3225780dc65c0e94a00e2a9/27591188141.pdfIn PDF document text
    • https://fanaf.comarticle_ressources/file/dosokawuvomutiwinotagonak.pdfIn PDF document text
    • https://parisautotravel.com/wp-content/plugins/super-forms/uploads/php/files/je221f1o04idc5tn04m6jg8pb6/pojekazurokoman.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/16dd4dd1445449c58eac9a55373d79ac/vomamudiwarasagovos.pdfIn PDF document text
    • http://conwaychristian.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607355a4810bc---giferu.pdfIn PDF document text
    • http://mdsalon.ru/img/lib/file/36051035536.pdfIn PDF document text
    • http://willtorock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4d82655a15---5712149116.pdfIn PDF document text
    • http://gennarimaq.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16082a8652eee1---jufur.pdfIn PDF document text
    • https://camgloberealtor.com/userfiles/file/viginawugiwu.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/932bd0cdc270085ab2eae2d14352e01a/liziteje.pdfIn PDF document text
    • https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/8f5542456b125483cde988b711d9793f/jupesumemiwezabem.pdfIn PDF document text
    • https://bikinibody.be/wp-content/plugins/super-forms/uploads/php/files/0jgsrk63g27lhfbstad972nk3r/16878210955.pdfIn PDF document text
    • http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085ab9d8b11f---zudarajufozekizute.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d43b07a6742---97234652118.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_off00010f08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F08 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001271a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1271A 17656 bytes
SHA-256: 4742b8322c910ea65094f3fc71669bcef8f8f3c1b3d8063ec6f2876b6ccfd3cf
font_02_sfnt_off000154a9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x154A9 10624 bytes
SHA-256: de2984f5bfb1311cbe19f4266f999005bd64de2fc229c7203eb0f9fbed8ff47d

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