Malicious PDF — malware analysis report

Static analysis result for SHA-256 7eebe72fe76c74e0…

MALICIOUS

PDF

80.6 KB Created: 2021-09-08 17:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: dab73069162e3a946f7fc161b335d0b2 SHA-1: bec88b5555d17d27f075f57b34bc29af1cf52a1d SHA-256: 7eebe72fe76c74e0136a658896340c9089ef2d584eaed0cce6648cb1aa75705c
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URIs strongly indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 https://irlanc.ru/uplcv?utm_term=seaward+pv200+pdf PDF link annotation
    • https://zoorichi.com/temp/fckeditor/file/namidevisubukixulo.pdfIn PDF document text
    • http://rrmkaryacollege.org/rrmkarya/userfiles/file/26551804008.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/161311e5d50a78---44261070460.pdfIn PDF document text
    • https://tepihtrava.rs/files/94055175123.pdfIn PDF document text
    • http://swhos.com/upload/files/50755101539.pdfIn PDF document text
    • http://tcgardening.com/userfiles/file/2021090403473573499.pdfIn PDF document text
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/1ab20dd5e5ce74b505012ac3e49935f5/fesonapozixa.pdfIn PDF document text
    • http://stitesattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/12049417024.pdfIn PDF document text
    • https://aarushimukhwas.idealviews.com/userfiles/files/lekoxatotelamenaxokugazu.pdfIn PDF document text
    • http://biolabsrl.org/userfiles/files/razedojuwaxaxamekifajekaf.pdfIn PDF document text
    • https://cpsguffanti.it/uploads/file/tolapinudimosutuk.pdfIn PDF document text
    • http://huefpdf.org/upload/file/27196149751.pdfIn PDF document text
    • http://ddaengshop.com/ckupload/files/pilibefolerexipatikix.pdfIn PDF document text
    • https://domilot.com/uploader/files/nexuwowelabowani.pdfIn PDF document text
    • http://letsfinal.com/userfiles/file/fezego.pdfIn PDF document text
    • http://firesecurity.sk/userfiles/file/jazixabepezofeso.pdfIn PDF document text
    • https://khoahoc.timviec365.com/picturesfiles/kozokebaduw.pdfIn PDF document text
    • http://ijfbn.com/editor_up/lalokirowuluburomefinop.pdfIn PDF document text
    • http://kayapalinakliyat.com/file/xemiwirebuvuzipiwola.pdfIn PDF document text
    • https://rsebolivia.org/userfiles/file/1946212593.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/kugiviredate.pdfIn PDF document text
    • http://bangdientunhk.com/upload/files/96703870532.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-9-5/20210905031947673953.pdfIn PDF document text
    • 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_off0000d38c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD38C 19092 bytes
SHA-256: 9b927e72f4e70746835bd7348af5d87e5e631d1b947b6c71bd21be2ee689066f
font_01_sfnt_off000105a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105A5 10332 bytes
SHA-256: cb783fe4feba7c2ec139395aed2d0ca552e99b4b5c94555a8a5d97b129b17e16
font_02_sfnt_off00011d2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11D2D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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