Malicious PDF — malware analysis report

Static analysis result for SHA-256 eaa3fa120643cffe…

MALICIOUS

PDF

85.7 KB Created: 2021-06-30 20:25:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 0438c60313de1c6a112a64771a417d08 SHA-1: 4c594759f73298403ef080a19d55f5ff2ebb2c66 SHA-256: eaa3fa120643cffe357b54bcb94e5452ac7355fcc3b312298a26a10cdc652fbc
156 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, with many URLs pointing to compromised WordPress upload directories, suggesting an attempt to host or distribute malicious content. The presence of numerous PDF_SEO_DISPOSABLE_LINK_FARM firings further supports this, indicating a tactic to obscure the true malicious destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9930

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://parkwestresidences.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6bb58edf5---16484818551.pdf In PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160ab1e28e5e37---nuzamanutimaf.pdfIn PDF document text
    • http://softwarefactory.nl/images/file/26493391175.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c15b15693fd---suvabujit.pdfIn PDF document text
    • http://unnatiwelfareorganization.com/ckfinder/userfiles/files/xonujudujiminupojodedoke.pdfIn PDF document text
    • http://aite-materials.com/upfiles/file/43941164393.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/0fae65fdf06af1b0dbf42aae0ea6ef01/58210893419.pdfIn PDF document text
    • https://weddingitaly.jp/images/file/zuwaxetolobejuzu.pdfIn PDF document text
    • https://greshamgilessalon.com/wp-content/plugins/super-forms/uploads/php/files/fcf62e864f9ab50e19c431ac71fb7de8/79429081342.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16073f4caea849---lijadibez.pdfIn PDF document text
    • https://afanasyev-design.ru/wp-content/plugins/super-forms/uploads/php/files/fc964e066652b15f4e53243f227d18d5/golitopexutufi.pdfIn PDF document text
    • http://myhomeinparis.com/userfiles/files/potetifu.pdfIn PDF document text
    • https://activepymes.com/pub/file/nogotefov.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/160a7f75e2d300---81189986931.pdfIn PDF document text
    • http://www.alquilerbares.com.ar/wp-content/plugins/formcraft/file-upload/server/content/files/1606c87fa328fa---87929792805.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a978668aee0---jimanosepepubagedovijeno.pdfIn PDF document text
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16082d6743e1b6---36343244112.pdfIn PDF document text
    • http://vieclamquantri.net/upload/files/19565902864.pdfIn PDF document text
    • https://brunoamaranti.it/wp-content/plugins/super-forms/uploads/php/files/7vqu3eed4t2qnt9t68gctb7ed1/93657251544.pdfIn PDF document text
    • http://allamericannursing.com/userfiles/file/71887142515.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/53301430355.pdfIn PDF document text
    • https://subarini.ro/mm/file/126439326.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/xupitugonolidebika.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=french+montana+no+stylist+mp3+downloadPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012153.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12153 22756 bytes
SHA-256: 6f80990c8c27126cc59619f0971921dee1e591bb0674fac34e1babd77a34e40f
font_00_sfnt_off0000c06f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC06F 18176 bytes
SHA-256: d050521c0dc51a9bc74b1c72cc84e5793399f1f66b22d1aa5bfd10bb88096b23
font_01_sfnt_off0000ef69.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF69 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010780.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10780 11128 bytes
SHA-256: 8c3350279f14faacbe8eba591e6a686b5375282f19b6fed566b041e920917fee

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