Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeeba2f134865e41…

MALICIOUS

PDF

73.2 KB Created: 2021-09-12 14:31:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: bb3e7b8e0054a321f033915c3b34288d SHA-1: 73db25c83fad394bca899393e2a8f45d6a218892 SHA-256: eeeba2f134865e410397b8e7dc5fae8bfefaf9624be9958517e36f6af5dc715e
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous external URIs, with one specifically identified as a link farm on disposable hosting, suggesting a phishing or redirection scheme. The PDF structure and embedded URLs point towards a spearphishing attachment attack vector, likely aiming to lure users to malicious websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9947

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=serp+results+checker PDF link annotation
    • https://118highschool.am/wp-content/plugins/super-forms/uploads/php/files/dfd85d76611dce010adeb9d2ee4aae54/22003634729.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/43117772887.pdfIn PDF document text
    • http://golfvillageonline.com/userfiles/file/zigegolajun.pdfIn PDF document text
    • https://cuatudongnhatrang.com/uploads/files/vizubosufibogif.pdfIn PDF document text
    • http://www.jindatunnel.com/up_files/file/fivuzaxizesawifa.pdfIn PDF document text
    • http://saveursetsavoirs.fr/image/file/dejevosovedukavu.pdfIn PDF document text
    • http://nhadatv.com/webroot/img/files/jijedoguzajafunarima.pdfIn PDF document text
    • https://izr.fr/files/37699466435.pdfIn PDF document text
    • http://ancheng-medical.com/uploadfile/files/fukejurijejuxiva.pdfIn PDF document text
    • https://njshore.drinkpoint.com/uploads/files/dejaberadufune.pdfIn PDF document text
    • http://tdbm.vn/upload/files/titazovo.pdfIn PDF document text
    • http://bordahusfeldolgozo.hu/editor_up/67923779510.pdfIn PDF document text
    • https://essuances.com/ckfinder/userfiles/files/nekoxivuzevibogutag.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/1613915aade710---13001362119.pdfIn PDF document text
    • http://gbfrjournal.org/pds/userfiles/files/82552954477.pdfIn PDF document text
    • http://locke-3c.tw/uploads/files/202109020648083931.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16131702902474---31484938364.pdfIn PDF document text
    • http://centralgiving.com/media/userfiles/file/rekufafuxumikel.pdfIn PDF document text
    • http://carrollcountylawyers.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/davobogomowariwaxob.pdfIn PDF document text
    • https://8foro.exceltur.org/exceltur_nuevo/ckfinder/userfiles/files/57775116281.pdfIn PDF document text
    • http://energosol.pl/images_cms/file/43896409492.pdfIn PDF document text
    • http://heaig.org/editor/ckfinder/userfiles/files/73714028146.pdfIn PDF document text
    • http://oishisushigd.com/uploads/files/33652930608.pdfIn PDF document text
    • http://theflowermaker.com/uploads/File/12987819068.pdfIn PDF document text
    • http://auburn-properties.com/userfiles/files/52340607938.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_off0000bf58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBF58 10260 bytes
SHA-256: 137c4ab8f3be1746eda6dee972a8c88c68779994e46d1f311b85ed58120c3069
font_01_sfnt_off0000d694.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD694 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eea6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEA6 16208 bytes
SHA-256: 33d42f28c94cfa7d8cfd9727967496475866c2baacc5a97094a9791cb95bcf0a