Malicious PDF — malware analysis report

Static analysis result for SHA-256 e09da3fed3896327…

MALICIOUS

PDF

316.5 KB Created: 2021-07-18 20:55:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7d728eb73d00bd4f34f600b0b7dfc627 SHA-1: 67417a8fa977ef626e24b9e39a629b1f55e20fdf SHA-256: e09da3fed3896327e21ea67ffb0f097c5d3d14c3316d94807801ef5d5f73022c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many of which point to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The presence of embedded URLs and the nature of the heuristics indicate a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9778

Heuristics 5

  • 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.
  • 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://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f5335061d4---88865821654.pdf In PDF document text
    • http://circolosilverblufitnessclub.eu/userfiles/files/sabadatopesurororeg.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8a87c1969---zotanufafaxeritijiweva.pdfIn PDF document text
    • http://mai-colle.jp/userfiles/file/susazasuxovipevoz.pdfIn PDF document text
    • http://studiotrusso.it/userfiles/files/zonoweruf.pdfIn PDF document text
    • https://happycustomerservice.com/wp-content/plugins/super-forms/uploads/php/files/be54ea55ae42f3eae6d5a9cc1a79a00c/mepaxitivuwog.pdfIn PDF document text
    • http://aven.su/userfiles/file/radomabojipurugi.pdfIn PDF document text
    • https://popcouncilinstitute.org/wp-content/plugins/super-forms/uploads/php/files/215f3517fb04806dacace693ca737e5d/65545332698.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/4e5bfbfa888bef927be22062b8fa81e6/jigefuki.pdfIn PDF document text
    • https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/34a4263cf57beaf2a90f0a396176d134/92677520509.pdfIn PDF document text
    • http://northcity.rs/slike/files/fezaludufasivofin.pdfIn PDF document text
    • http://urparitet.ru/admin/ckfinder/userfiles/files/burijesofonili.pdfIn PDF document text
    • http://coalcreekcentenary.com/clients/5/52/52f735e63eff8706e1a2a73a20aef632/File/ruzilatakudofavamowe.pdfIn PDF document text
    • http://polish-house.com/uploades/fckeditorfile/96278183523.pdfIn PDF document text
    • http://garystrike.com/clients/3/30/301ae0ed988f9237e4cb8f8c41f6cb36/File/nevizavutat.pdfIn PDF document text
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/764bcd01341d23eedf28922cd6c13420/vabusogatitipafazixas.pdfIn PDF document text
    • http://www.loicadesacavem.pt/wp-content/plugins/formcraft/file-upload/server/content/files/16082fe18965da---89292567409.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/vbsd04eb724on41komrkjpiv6v/5167558588.pdfIn PDF document text
    • http://zaun-produzent.de/userfiles/file/putagis.pdfIn PDF document text
    • https://corianderedmonton.com/ckfinder/userfiles/files/24934897139.pdfIn PDF document text
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609db65ec1616---sitosifiwijuxuleloro.pdfIn PDF document text
    • http://normel.org/files/upload/file/kufegizadakaxulopoxexez.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16096d4b59c982---48220781597.pdfIn PDF document text
    • https://archcosmeticstudio.com.au/wp-content/plugins/super-forms/uploads/php/files/ac837313188076c7d4e62a07d693b2a0/dunoke.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=nrol+launch+todayPDF 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_off000482e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x482E6 18436 bytes
SHA-256: d48cbdf914c8e04d3f78bef9ec7a795c5d3f0d702e2581c4dccec81fa7cb9120
font_01_sfnt_off0004b3fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B3FA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0004cc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC11 10268 bytes
SHA-256: f492f378e17d3c9891affffdabb1f642bcc6fb4a4e616898ea3bb6a055bd9ed4