Malicious PDF — malware analysis report

Static analysis result for SHA-256 612222925f17ed6b…

MALICIOUS

PDF

78.5 KB Created: 2021-09-12 19:36:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8f41f76c84bb5f9bfedd6754330d0b70 SHA-1: dd25d96010780c93acc2a9eeb4285c98de8fe224 SHA-256: 612222925f17ed6bea1722258d74da788858c043468cfb0623ef63c068f9423f
126 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. Numerous embedded URLs, many pointing to disposable domains, suggest a phishing or link-farming scheme. The PDF structure and link farm heuristic strongly indicate an attempt to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9949

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 http://rafaelstore.ru/upload/files/tisuluxitevotegidobeg.pdf In PDF document text
    • http://stilna-ya.com/_userfiles/file/fasisugukodesu.pdfIn PDF document text
    • http://gyermekhaz.hu/Content/site_images/files/sabufexexakemi.pdfIn PDF document text
    • https://vibanghanoi.com/uploads/files/xoseromamubufogulanu.pdfIn PDF document text
    • http://centroolosprato.it/userfiles/files/49020364703.pdfIn PDF document text
    • http://makinsushi.com/uploads/files/sodumebonetakedoref.pdfIn PDF document text
    • http://mensagemcrista.com.br/ckfinder/userfiles/files/18223728427.pdfIn PDF document text
    • https://receptabc.hu/images_banner/files/jejutopej.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/202199185007628.pdfIn PDF document text
    • http://le-lemniscus-incandescent.fr/ckeditor/upload/files/pevizimeboleruf.pdfIn PDF document text
    • https://digireg.li/upload/solipiti.pdfIn PDF document text
    • https://huaku3c.tw/uploads/files/202109090434232534.pdfIn PDF document text
    • http://cnc-soustruzeni.cz/files/file/39965103385.pdfIn PDF document text
    • http://northmarking.com/userfiles/files/25340770240.pdfIn PDF document text
    • http://hijoin.hu/editor_up/68408253115.pdfIn PDF document text
    • http://mmprogetti.it/userfiles/files/75322885397.pdfIn PDF document text
    • https://amzentransportationindustries.com/admin/imagetemp1/file/2431623585.pdfIn PDF document text
    • http://uniondrygoods.com/fckeditor/userfiles/file/zuwet.pdfIn PDF document text
    • http://systemsbiology.at/uploads/assets/file/36307774034.pdfIn PDF document text
    • https://onsale.social-push.cc/data/fckeditor/files/64587119502.pdfIn PDF document text
    • http://josepholszowka.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/dobujumobig.pdfIn PDF document text
    • http://valdhans.cz/userfiles/file/43085528431.pdfIn PDF document text
    • https://lockerova.eu/admin/upload/documents/tudub.pdfIn PDF document text
    • http://www.megasaludips.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ebd4eba476---sisebesitujufepe.pdfIn PDF document text
    • https://mlbcsimleague.com/ckfinder/userfiles/files/telirexepinerupokomowo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=tom+and+jerry+movie+onlinePDF 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://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_off0000cdc3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDC3 10416 bytes
SHA-256: 72cb7f8dfd54c9158aaf815416091ee53fd84b27628c9dfbc31cc3683c8af94f
font_01_sfnt_off0000e541.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE541 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fd53.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFD53 18220 bytes
SHA-256: 946400e82f84e203ba4f76aa1b7352c158290da789664fdbb6a16bf0a17d71e0

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