Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eb96f91c4df862…

MALICIOUS

PDF

88.9 KB Created: 2021-09-18 14:27:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 317cf5f5aa3f204a01bc157c245a33ff SHA-1: cc35c095474c5058dc8c4072663ed9b1a9755f48 SHA-256: 07eb96f91c4df86270bc9becc2296b0840ace8f03d081a0e0da745553181ed32
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature, classifying it as a phishing trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://eva.am/files/01f8402c3ba51dc4.pdf In PDF document text
    • https://www.formwork.co.uk/wp-content/plugins/super-forms/uploads/php/files/q9spkuum5u6ac37lhnpj21jfup/konabopilixuv.pdfIn PDF document text
    • http://termocity.by/pics/files/vuzabukojomimiz.pdfIn PDF document text
    • http://thai-apsproducts.com/file_media/file_image/file/zovunazub.pdfIn PDF document text
    • https://jamisonfurnace.ca/userfiles/files/sagakugeg.pdfIn PDF document text
    • https://nppmaudaha.in/ckfinder/userfiles/files/88282194095.pdfIn PDF document text
    • http://palestraarkadia.it/userfiles/files/93076000321.pdfIn PDF document text
    • http://andreuma.madteam.net/ckfinder/userfiles/files/79878463815.pdfIn PDF document text
    • http://myshiou.com/uploads/files/202109121407261777.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161374452a1ee4---34401178111.pdfIn PDF document text
    • http://bigdoughpizza.com/uploads/files/41432533256.pdfIn PDF document text
    • https://pvcmikser.com/upload/files/50505509873.pdfIn PDF document text
    • http://myapartment.de/web/editor/files/76911835088.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/lenafisolowoxitam.pdfIn PDF document text
    • https://atrax.eu/userfiles/file/mazobifumipi.pdfIn PDF document text
    • https://cyc-catering.pe/disac/userfiles/file/58397692008.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/lbvqpjmcbjpefaevvijen78hm3/nelutisojumapifasanome.pdfIn PDF document text
    • http://chongthamphucthang.com/images/news/files/lutigeruxisajarukofun.pdfIn PDF document text
    • https://deesudcoolingtower.com/userfiles/file/89834792045.pdfIn PDF document text
    • http://goldstecq.com/userfiles/file/42759991784.pdfIn PDF document text
    • http://wwpokebar.com/uploads/files/janozixamojurubaritum.pdfIn PDF document text
    • https://nutrishop.in/ci/userfiles/files/vabox.pdfIn PDF document text
    • http://hotelbasantresidency.com/uploads/64816660196.pdfIn PDF document text
    • http://www.dilipprabhavalkar.com/images/file/jubejofedizutude.pdfIn PDF document text
    • http://inggeo.eu/userfiles/files/49686949063.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=tenses+exercise+for+class+9+pdfPDF 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_off0000f540.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF540 10748 bytes
SHA-256: aed2124c90d37ed7281f8c6e070f1db2276f5601d08da6a37807141c6aa8f9f4
font_01_sfnt_off00010e18.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E18 18332 bytes
SHA-256: 2f3896a3f98ffca376f388c19ba38e685e4234370411121305ab2ae7dd4612e8
font_02_sfnt_off00013e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E0E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1