Malicious PDF — malware analysis report

Static analysis result for SHA-256 2868e54b7eacef24…

MALICIOUS

PDF

82.7 KB Created: 2021-08-01 13:57:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-21
MD5: 62008ecedf4294258c10eb8fd53a9d0a SHA-1: 20a398965373b220cb65964ad25e76eeb960227e SHA-256: 2868e54b7eacef242f3660074f2e121e3c940638a61d429cffaef8ccccd0edcf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous external links, many pointing to compromised WordPress sites, suggesting a link farm or redirection mechanism. The document body is heavily obfuscated and unreadable, but the presence of external links and the overall detection profile indicate a malicious intent, likely to redirect users to phishing pages or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://chcial.ru/uplcv?utm_term=how+long+to+read+dr+jekyll+and+mr+hyde PDF link annotation
    • https://southtours.com/wp-content/plugins/super-forms/uploads/php/files/7904c9hogm7pq6nhvb4l823m03/vufurevifuporoz.pdfIn PDF document text
    • https://alsultantrading.ae/userfiles/files/96095400423.pdfIn PDF document text
    • http://bogelaipigeon.com/upload/file/ruxot.pdfIn PDF document text
    • https://www.sanier.pl/wp-content/plugins/super-forms/uploads/php/files/1a6i2efghosutfpo6r31r0i984/mifelevovasu.pdfIn PDF document text
    • https://we-plus.tw/ckfinder/userfiles/files/xibixos.pdfIn PDF document text
    • https://wurstfargo.com/wp-content/plugins/super-forms/uploads/php/files/78fb63adbe996e31364119a383bfcce4/newagovovagagukopeguje.pdfIn PDF document text
    • https://vinamex.info/uploads/news_file/48826331415.pdfIn PDF document text
    • http://parmalab.it/userfiles/files/sotik.pdfIn PDF document text
    • http://www.mondzorgvesa-voorschoten.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607d126f88c84---wiwaxarel.pdfIn PDF document text
    • https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d07ddda845---juwojegosuj.pdfIn PDF document text
    • http://tryinvest.eu/userfiles/files/20204724309.pdfIn PDF document text
    • https://soccerauquebec.com/userfiles/file/28490238024.pdfIn PDF document text
    • http://asianaccounting.com/admin/fckeditor/userfiles/file/80858022960.pdfIn PDF document text
    • https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/3e035614dbe215c857077b3331ae15a0/lununudedipugitoxe.pdfIn PDF document text
    • http://youandisagenix.com/ckfinder/userfiles/files/nakaxoxubop.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/4e150cefa79c260ab4fdf4d0bcca8d77/12727174807.pdfIn PDF document text
    • https://www.americansummercamps.com/wp-content/plugins/formcraft/file-upload/server/content/files/160713c367cde5---12967493296.pdfIn PDF document text
    • https://vasantviharproperties.com/userfiles/file/20199206103.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/89412705904.pdfIn PDF document text
    • http://flywings.sk/UserFiles/file/vewimarefugawot.pdfIn PDF document text
    • https://lightsourceindiana.com/wp-content/plugins/super-forms/uploads/php/files/7f705e6f18dd9c722b6acc1c1409cb69/nadigarulogijinoxujotin.pdfIn PDF document text
    • https://tktravelkorea.com/FileData/ckfinder/files/20210630_DF9015F5197474F9.pdfIn PDF document text
    • https://creationstationdance.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f2d0587a786---22431652209.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_off0000deaf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEAF 10848 bytes
SHA-256: 6be07409e4c67356a6c4d098a91b3fc487b7d248757413833d17f55707e591e9
font_01_sfnt_off0000f768.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF768 16776 bytes
SHA-256: 6d975ced545fa751e76848ca314bd3235fe297d2730f9b28287c8291040931ef
font_02_sfnt_off00012335.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12335 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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