Malicious PDF — malware analysis report

Static analysis result for SHA-256 482793e50f87b11e…

MALICIOUS

PDF

70.4 KB Created: 2021-10-03 08:03:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 0f121cfc7ca2c1acc260516843ef0c21 SHA-1: e5a8dda15d1fc5c6360de9b2879bd7296f96143b SHA-256: 482793e50f87b11ee48aae6374e177bc58f5b02a1e70052f14bdb94f3867efd8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, with one heuristic identifying it as a link farm on disposable hosting. While no scripts were explicitly extracted, the presence of external URIs and the nature of the heuristics suggest an attempt to redirect users to malicious sites, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • 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://sloplast.com/userfiles/files/tejofolus.pdf In PDF document text
    • http://zrdb-drogbud.pl/Upload/file/vapegatimawobewula.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/tiweginidabimorati.pdfIn PDF document text
    • http://clairerolo.com/userfiles/file/wamanezetuborufarobubapaf.pdfIn PDF document text
    • https://lifesmart.ro/ckfinder/userfiles/files/medegolamoxagotimenedosek.pdfIn PDF document text
    • http://chatyzvule.cz/uploads/ponegejasokis.pdfIn PDF document text
    • https://istanajp2.com/contents/files/17407264220.pdfIn PDF document text
    • http://sofia-es.tokyo/yamituki-n/uploads/files/mutavababilotiz.pdfIn PDF document text
    • https://jackyrouxmethode.com/userfiles/file/getokixonuvejuviz.pdfIn PDF document text
    • http://ukrkarta.ua/fckeditor/userfiles/file/vuwozelofanarubenupel.pdfIn PDF document text
    • https://nguyenvanhuongloc.vn/app/webroot/files/images/pages/files/gogovufajejivuvu.pdfIn PDF document text
    • https://pemaboutiquehotel.com/assets/userfiles/files/gabojilirogate.pdfIn PDF document text
    • https://www.okcfarmersmarket.com/wp-content/plugins/super-forms/uploads/php/files/3d667dfd0528e83955e7d9379f4d7c97/61858230560.pdfIn PDF document text
    • http://hurtglass.pl/upload/file/46650817118.pdfIn PDF document text
    • http://duhochoangthanh.com/upload/files/gupevixuvepeso.pdfIn PDF document text
    • http://christopherspubandgrille.com/userfiles/files/66284854712.pdfIn PDF document text
    • https://stiglic.sk/userfiles/file/jofavitudozasutoxaw.pdfIn PDF document text
    • http://namlinhchivietnam.net/userfiles/image/file/75829100111.pdfIn PDF document text
    • https://cr2tek.com/userfiles/Proj_Name/files/98178136174.pdfIn PDF document text
    • http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/r5c7d4s3t2s7233omglm638ko5/bujobol.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/77859195275.pdfIn PDF document text
    • https://yakin-surewin.com/media/file/komexanakumukit.pdfIn PDF document text
    • http://bearings-home.com/userfiles/file/rexajatoxifeda.pdfIn PDF document text
    • http://icsbc.ru/fuploader/file/nakugavus.pdfIn PDF document text
    • https://chameleoncoupons.com/adgprocessing/uploads/files/27986589288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=angel+food+cake+and+crushed+pineapplePDF 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_off0000b2b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB2B0 15488 bytes
SHA-256: b6ecd62affe1f4365942698f22c98fb9ea9baa77ad1be5718158da82474159a8
font_01_sfnt_off0000da52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA52 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000f269.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF269 10972 bytes
SHA-256: 2c710b09919e019a900f7c90b7fccf019849640a7ca530417daf2f69fd502e26