Malicious PDF — malware analysis report

Static analysis result for SHA-256 0aba328a436b1417…

MALICIOUS

PDF

81.0 KB Created: 2021-09-06 10:44:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 962abcadca6082d5b707f40b4ef76cf7 SHA-1: 49a30ebea22102c539a2154d64f8a10f3248c403 SHA-256: 0aba328a436b1417db058f35e429324bd95b8cd42ecb42d750e9925a72d85083
156 Risk Score

Malware Insights

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

The PDF contains numerous links to compromised websites, indicating it functions as a link farm. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple distinct hosts and the use of 'utm_term' parameters in some URLs point towards a coordinated effort to lure victims.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://geombiagioschettino.eu/userfiles/files/mopaxi.pdf In PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/5amnkd8q330jdniqoilcck42go/fowugirarumejudimubem.pdfIn PDF document text
    • http://dga.gr/ILC/img/file/57042382852.pdfIn PDF document text
    • https://jairdefreitas.com/ckfinder/userfiles/files/fezojalube.pdfIn PDF document text
    • http://girc.ncue.edu.tw/ckfinder/ckfiles/files/41407687537.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/b63e273a53e9906ad7dfb037b870bfe8/21480120564.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/8e66690d29024e853dfc1365356e02a0/52903643892.pdfIn PDF document text
    • https://purefeeling8.com/data/file/32829952799.pdfIn PDF document text
    • https://mylin.in/ckeditor/ckfinder/userfiles/files/jexopijasovusivugup.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210730/file/16276325917650.pdfIn PDF document text
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/4f50dedba4c729af5d7c13a1dcad01e8/bijuvixigizafibe.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16075d9ebd1894---bonazewujowulofamokos.pdfIn PDF document text
    • http://skolicka.eu/foto/images/file/bawetugenalejarotibup.pdfIn PDF document text
    • http://www.kmclogistics.com/wp-content/plugins/super-forms/uploads/php/files/3030e43d5ec67fce8758538592eb6efb/xafaliv.pdfIn PDF document text
    • https://profbuhotchet.ru/wp-content/plugins/super-forms/uploads/php/files/d1c1b24179846d8246ec434ccd9a293e/nexobew.pdfIn PDF document text
    • http://cityhighclassof77.com/clients/9/9e/9ea685038b5a197d2022a69b8c6b162a/File/vokelifigavajuwonofaridam.pdfIn PDF document text
    • http://be-now.pl/userfiles/file/43646997518.pdfIn PDF document text
    • http://edgecs.net/documents/jemeledejexoxotukagaseja.pdfIn PDF document text
    • https://yuktogel.com/contents//files/59196555996.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/11098077606.pdfIn PDF document text
    • http://culbertsonlawyer.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76301988918.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/A3Ryygt5BCM/uplcv?utm_term=geometry+trigonometric+ratios+worksheet+answer+keyPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/a7c41a944f5d4d842a47a5727c9a99fa/nutapeb.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_off0000d62d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62D 17960 bytes
SHA-256: c67dbfbe5eea1947aa9d0f056755e9f949fbe56d1b5d45fc0d6b436da6163aa5
font_01_sfnt_off000104d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011ce8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CE8 10964 bytes
SHA-256: 0fc988f27d40fd2a4246fcad343b15693bf5621b1623fcf98eb1ed975f9325f4

Open this report in the interactive analyzer, or submit your own file for analysis.