Malicious PDF — malware analysis report

Static analysis result for SHA-256 30bed54c0f02e219…

MALICIOUS

PDF

69.3 KB Created: 2021-10-03 16:23:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: b47e757f5ba0f8f7f437f7066f25a2b9 SHA-1: f7f2f2fa84dd18d12303fbb1e98521295ebc9209 SHA-256: 30bed54c0f02e21970dc0107684684bbe92c2a9b3c01a8c645aa6f6fd8b45b06
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded JavaScript and numerous external URIs, many of which point to potentially disposable hosting, suggesting a link farm or phishing lure. The presence of embedded JavaScript (T1059.007) indicates an attempt to execute code within the PDF viewer, likely to redirect the user to malicious sites or download further payloads. The overall pattern suggests a spearphishing attachment (T1566.001) designed to compromise users.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9968

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://dietetyka-24.pl/images/files/84034114879.pdf In PDF document text
    • https://eownauto.com/uploadpic/files/19227900882.pdfIn PDF document text
    • https://phuketwebstudio.com/ckfinder/userfiles/files/zebowefadorikajunufazim.pdfIn PDF document text
    • http://www.village-gaulois.org/gestion/ckfinder/userfiles/files/sasegisizuxefipetunu.pdfIn PDF document text
    • http://drdj.friend-match.com/upload/files/55794249740.pdfIn PDF document text
    • http://www.florentmaussion.net/userfiles/File/40794225971.pdfIn PDF document text
    • http://sayarbobinaj.com/file/76785419488.pdfIn PDF document text
    • https://giverny-bkk.com/upload/files/lojomapibotelupereteba.pdfIn PDF document text
    • http://spiregene.com/image/files/20210904_101128.pdfIn PDF document text
    • http://forepic.com/_UploadFile/Images/file/zonodexajuxomijo.pdfIn PDF document text
    • https://biocenfis.es/uploads/assets/file/32436120321.pdfIn PDF document text
    • http://anhbanglaw.com/userfiles/file/71723890020.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/98629726756.pdfIn PDF document text
    • https://www.aifimm.it/admin/inc/ckfinder/userfiles/files/41776755852.pdfIn PDF document text
    • http://domuran.pl/files/file/81449666008.pdfIn PDF document text
    • http://lngpetro.com/userfiles/file/22458244444.pdfIn PDF document text
    • http://www.hon-ro.hu/userfiles/files/4009581438.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/24171871968.pdfIn PDF document text
    • http://webbolt.fono.hu/data/editorfile/xifexe.pdfIn PDF document text
    • https://www.xyoaa.org/sites/default/files/files/juzebimukidutabosovozi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=belize+country+flagPDF 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://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_off0000affc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAFFC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c80e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC80E 16648 bytes
SHA-256: be07fe7dfa8428e6f75eb3aa43b2ffbffbcd213f66c84eda07a2484563be84c7
font_02_sfnt_off0000f29e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF29E 10668 bytes
SHA-256: c337d8d7ae5c9266128a44b9928e7ca1b01a21651630319340559179d6b5508e

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