Malicious PDF — malware analysis report

Static analysis result for SHA-256 2eade2cdbea4a6a2…

MALICIOUS

PDF

80.0 KB Created: 2021-09-01 05:09:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 472f63a2aba90a17d844e2cc9289bd25 SHA-1: 941c892bd59d639732c65f0a58322b9ec77f70ae SHA-256: 2eade2cdbea4a6a2ef4df41731731c9046bf99aa941232f9604950ed58667855
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous URLs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/145812892460a1330c657fe.pdf In PDF document text
    • http://tandartsindex.nl/images/uploads/8493821159.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098ad44e0e56---52889692308.pdfIn PDF document text
    • http://www.trimbleexpress.sk/wp-content/plugins/formcraft/file-upload/server/content/files/1607ae5fe444b9---buterujorevonatavopox.pdfIn PDF document text
    • http://bilagroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f0ad9ddd1e---49068905858.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c574291ad81---jigipur.pdfIn PDF document text
    • http://optimus.org.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c427b41fefc---77164324279.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/d7c9e313ac17b20ebae13d147c141ad8/segeli.pdfIn PDF document text
    • http://tantusmarina.com/UserFiles/file/69240036467.pdfIn PDF document text
    • http://www.playerclub.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1611a9b071cca1---21299589629.pdfIn PDF document text
    • http://www.letnifestiwal.pl/ckfinder/userfiles/files/88045278980.pdfIn PDF document text
    • https://albawadiroad.com/userfiles/files/jakuxuv.pdfIn PDF document text
    • https://action-roofing.com/wp-content/plugins/super-forms/uploads/php/files/f98249aed760952175ab7f143aa1d0ca/razovedimizijurujebi.pdfIn PDF document text
    • http://eraldocomo.it/userfiles/files/jejizodel.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608a26e833599---juxixanade.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/aa38f2268bb79c5b2f30b5a247b46515/10805696540.pdfIn PDF document text
    • http://svatba-emi.com/uploads/pages/files/kogowulumibajadimi.pdfIn PDF document text
    • https://laurallo.com/ckfinder/userfiles/files/sazuruxarefovabilinaviwun.pdfIn PDF document text
    • http://barrarioservicos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160742fc325929---sofoduresobolamefaditag.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160d26782cb86a---bizotokomefan.pdfIn PDF document text
    • https://icbacademy.com/upload/files/geveluwawin.pdfIn PDF document text
    • https://www.hauptsache.cc/wp-content/plugins/formcraft/file-upload/server/content/files/16079b3e2cc3d5---nejezafasikazuditaz.pdfIn PDF document text
    • https://sellerflows.com/wp-content/plugins/super-forms/uploads/php/files/60072cc682d383d4f12b752cbd68aec8/jalola.pdfIn PDF document text
    • https://lakeshoresmilesdentistry.com/wp-content/plugins/super-forms/uploads/php/files/oij7093q9aaj6piq84runke3j1/8318790415.pdfIn PDF document text
    • http://paintmaster.hu/js/ckfinder/userfiles/files/kagamowubakusu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=one+month+notice+to+vacate+flatPDF 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_off0000d53b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD53B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ed52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED52 10424 bytes
SHA-256: 1531e439a40ede9d2ed123accf205f49b3d0c76d72bcd2d7326344a96058fff2
font_02_sfnt_off000104be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104BE 17452 bytes
SHA-256: 0c184956173dc90ff6db6b754d720ac798eef29d07be2b653b2ef07176b30514