Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6ea3704aabbb6bf…

MALICIOUS

PDF

79.2 KB Created: 2021-10-11 15:42:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-03
MD5: e6a74a9b36094913f9962d915415d0ee SHA-1: bfa695e1b2b4b61721bfb5ecb4e9e8b326acec66 SHA-256: e6ea3704aabbb6bf082444f8ea736df7d0cfb496bb0c180c1f7f4a91de200b9e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded URLs, many of which are hosted on disposable domains and appear to be part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. Although no scripts were explicitly extracted, the PDF structure and numerous external links suggest it's designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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 https://pixomot.ru/uplcv?utm_term=orford+beachside+holiday+park PDF link annotation
    • http://geerhannutpourreussir.be/docs/upload/files/futulabuzunugatujuzunel.pdfIn PDF document text
    • http://hyunsin.net/userfiles/file/selerasulabiseloxi.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/99109022110.pdfIn PDF document text
    • http://www.siphonicflowmandiri.com/upload/files/segevumifumekivefibigugew.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/19339097110.pdfIn PDF document text
    • https://goodmix-psc.com/userfiles/files/89520792653.pdfIn PDF document text
    • http://harnettcountyhba.com/userfiles/file/derolubinazazevomugurowi.pdfIn PDF document text
    • https://fainitelecommunication.com/public/editorfiles/file/xogubulupodagik.pdfIn PDF document text
    • https://www.carlosfunes.es/wp-content/plugins/formcraft/file-upload/server/content/files/16155bbc2dc9b6---betazidopevoxeloduvupoxi.pdfIn PDF document text
    • https://lee-trading.tw/archive/upload/files/junabewelifeduta.pdfIn PDF document text
    • http://casaledellasignora.it/userfiles/files/jodexewovukusafexa.pdfIn PDF document text
    • http://fuguchair.com/upfolder/e/files/20211001231625.pdfIn PDF document text
    • http://mavelikaradiocese.org/rapha/ckfinder/userfiles/files/30891059497.pdfIn PDF document text
    • https://bepxuyenviet.com/upload/files/70561441889.pdfIn PDF document text
    • https://piti.leaddeehub.com/userfiles/files/tevinoragematatu.pdfIn PDF document text
    • http://planao.com/ckfinder/userfiles/files/vedalutiwemixatemenivet.pdfIn PDF document text
    • https://aaaxxion.info/images/file/79864150466.pdfIn PDF document text
    • http://onfireinteriors.com/userfiles/galuzosuramogovufokajikim.pdfIn PDF document text
    • https://ourcampuswindow.com/ckfinder/userfiles/files/tolufuvebufiwepa.pdfIn PDF document text
    • http://ruizhishengwu.com/uploadfiles/file/290700547511.pdfIn PDF document text
    • https://aristi-trap.com/upload/users/files/pukajixelegikizuvi.pdfIn PDF document text
    • https://siksp.megarhizo.com/ci/userfiles/files/davefepafabaxiraxid.pdfIn PDF document text
    • http://ocung.net/img/files/86298288335.pdfIn PDF document text
    • http://patroha.hu/file/13641017309.pdfIn PDF document text
    • http://sieuthicayxanh.vn/webroot/img/files/jexufuzaxezovopad.pdfIn PDF document text
    • https://newline-eg.com/userfiles/file/82085198297.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_off0000d1df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1DF 17256 bytes
SHA-256: bb960aa1381d5179d6e4b886394f3af601ed1a0222df8a149c6a7fa3cc9f8b67
font_01_sfnt_off0000fdbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDBE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000115d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115D5 10888 bytes
SHA-256: ce8ccacf25c6c65ebf8081ef290e2c19a0644f8115304cbb54a9e00d85e0d76d