Malicious PDF — malware analysis report

Static analysis result for SHA-256 2500d04e66be00af…

MALICIOUS

PDF

90.0 KB Created: 2021-08-02 05:11:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ed1809f1c85ea6b85dd55d250e340df SHA-1: 1a32b9ef282728df0eaf814013d87939d206bae8 SHA-256: 2500d04e66be00afa035e331afda00c4488e6c5e9fb4edcca012519ab9949958
156 Risk Score

Malware Insights

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

This PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised WordPress sites, suggesting it's designed to lead users to malicious content or downloads. The presence of multiple external URIs and link farms indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://sarujiovalente.com/wp-content/plugins/super-forms/uploads/php/files/pk0254plj6m1iig5oec49afhpu/zosimonimujojifularag.pdf In PDF document text
    • http://www.kickcommerce.com/userfiles/file/71095371340.pdfIn PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ed39474b73b---ledexilifatigila.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070be1f9876a---topev.pdfIn PDF document text
    • http://www.combatsim.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1607f30924aede---munutililelojax.pdfIn PDF document text
    • https://almuhja.net/ckfinder/userfiles/files/vasinalefafun.pdfIn PDF document text
    • http://kovove-ploty-brany-zabradli.cz/UserFiles/File/42315741.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082312995f79---xupipusiribodorodusudodop.pdfIn PDF document text
    • https://www.goldenplanet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16093b05854edb---96658654203.pdfIn PDF document text
    • https://www.americanapi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b83dc9486c---risuras.pdfIn PDF document text
    • http://kondicionery-dolgoprudny.ru/upload_picture/file/69253528089.pdfIn PDF document text
    • http://stpatricksreunion.com/clients/84553/File/93051830797.pdfIn PDF document text
    • http://bamt.be/wp-content/plugins/formcraft/file-upload/server/content/files/1607212b2703ac---kabadireji.pdfIn PDF document text
    • https://zebcom.in/userfiles/file/94438086250.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/depezirididotufib.pdfIn PDF document text
    • https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608af3858f3dd---pevaxoletabobufegewaxe.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/ae1c82eec747a44b88efeaca113f2f56/javedi.pdfIn PDF document text
    • http://gyobel.itpublic/file/33261260107.pdfIn PDF document text
    • http://suamayin.biz/userfiles/file/6350365594.pdfIn PDF document text
    • http://www.ellisrasbetonwerke.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1607b20085b351---savuxenemapamibal.pdfIn PDF document text
    • http://capitalclassof1970.com/clients/e/e7/e78cae7b17622b0161c193cbd63f4fd0/File/19082298753.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/b4bajt5odnui5gcq1p222dnmf5/22282067507.pdfIn PDF document text
    • https://marksiegeldds.com/wp-content/plugins/super-forms/uploads/php/files/8c516096092bf4b7994ab60b8e18bfe5/wepubu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=what+does+connectivitycheck.gstatic.com+meanPDF 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f897.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF897 17524 bytes
SHA-256: 3b7d77c79c82647ef017cb59b8e6d6e2309287b36249b81425fffb180cf1f99e
font_01_sfnt_off00012637.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12637 11000 bytes
SHA-256: cc1a627a65f6931a42b4e44820c3bd61819618bfb2949d2e62c697309c65c244
font_02_sfnt_off00013f7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F7A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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