Malicious PDF — malware analysis report

Static analysis result for SHA-256 501237e68f71982d…

MALICIOUS

PDF

85.1 KB Created: 2021-08-10 21:43:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 2613d2cdfec0ccfc7cb8664ffb72477e SHA-1: f7383d4c7b112846bbf4ef2bb5aa74208ef5cb2e SHA-256: 501237e68f71982d330c86d2f8e985be702bc07d511413d5d5378996856b3435
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple domains, many of which are hosted on compromised WordPress sites or disposable hosting. The document body is heavily obfuscated and does not provide clear textual content, but the presence of numerous external links suggests an attempt to redirect the user to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://donnasalon.ru/wp-content/plugins/super-forms/uploads/php/files/0e22eb9235a06b323788ecbb39ee30c7/21137326057.pdf In PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/0d4121c022e74d450068148e7e56b2b4/ketiwawajuvagaxa.pdfIn PDF document text
    • https://usdcp.jp/user_data/userfiles/files/zejunozado.pdfIn PDF document text
    • https://razvozka24.ru/wp-content/plugins/super-forms/uploads/php/files/1bd32d1dc86e44b5611b85a954dcdb6e/gejunizubuga.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/b041a1e6482cf05271f8c4a8243c2dab/zunefa.pdfIn PDF document text
    • https://badoza.net/userfiles/file/lonigazavarow.pdfIn PDF document text
    • https://doktor-ara.com/userfiles/files/6086474823.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/keresixawowavip.pdfIn PDF document text
    • https://by-express.com/upfiles/editor/files/14586797140.pdfIn PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16075f19d8875d---xufugasireroxamuwumefura.pdfIn PDF document text
    • https://twr1115.net/files/fckeditor/file/18606955908.pdfIn PDF document text
    • http://tbvshungviet.com/upload/files/zixigesuxagimadopivapip.pdfIn PDF document text
    • https://tch.lu/files/files/fitatujugedapelo.pdfIn PDF document text
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/30832de651bd403f674ffe59fed3111e/fupufexazokuzexonijuletiv.pdfIn PDF document text
    • http://vitalchurchesinstitute.com/files/file/vojizuwojizem.pdfIn PDF document text
    • https://esz.jp/img/editor/files/51676776865.pdfIn PDF document text
    • https://lawpropertyconsultants.co.uk/wp-content/plugins/super-forms/uploads/php/files/bueumdsq7p6849di11vlie50gn/nadedururadusarorebopifo.pdfIn PDF document text
    • http://pekingtogo.com/uploads/files/waludugur.pdfIn PDF document text
    • http://centonze-vini.com/userfiles/files/94988750469.pdfIn PDF document text
    • https://cardion.dk/gfx/fckimages/file/54231474879.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae42a132c15---karenumeji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=the+nutcracker+suite+piano+sheet+musicPDF 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_off0000e88c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE88C 17772 bytes
SHA-256: 059159ef0390cd359de7729da66b79c5428c973f032ecfb0a5b52872314cf052
font_01_sfnt_off00011600.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11600 10748 bytes
SHA-256: 52f54d5b562640c3682c1cdad454c3f768dfb4eca6e9ec899d3f18560efcad67
font_02_sfnt_off00012e90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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