Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b4960b87229968…

MALICIOUS

PDF

87.2 KB Created: 2021-10-23 00:04:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: df72549bfb203d7064c380a4b1671914 SHA-1: 37b63c4edac9111d4b80fe30b91e093e2758eef2 SHA-256: 84b4960b87229968aa9d5e92c1e620ae3249bebb22a1fa16e93f9ed70eeaa29a
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a phishing or malware distribution intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links, likely directing users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the overall structure point towards an attempt to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://simbotour.ro/ckfinder/userfiles/files/wudesavibu.pdf In PDF document text
    • https://alzubidi.com/userfiles/files/45637932312.pdfIn PDF document text
    • http://thumpamonpally.com/userfiles/file/tirazejifafikigugep.pdfIn PDF document text
    • https://ceiling.holcom.vn/webroot/img/files/75574397224.pdfIn PDF document text
    • http://quiltingacademy.com/fckeditor/userfiles/file/xapubaz.pdfIn PDF document text
    • https://windsbs.biz/files/file/kamegajebegapujefizewog.pdfIn PDF document text
    • https://shturnev.com/files/foFKED/file/rasomasenotavosulaj.pdfIn PDF document text
    • https://loyallcanada.com/editor_files/file/26906412505.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/pikanat.pdfIn PDF document text
    • http://haai.org/upload/file/99019135466.pdfIn PDF document text
    • http://enotecagaribaldi.it/userfiles/files/85144493089.pdfIn PDF document text
    • http://vdgairconditioning.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1616f17ff8eaaf---bemokeziku.pdfIn PDF document text
    • http://www.nomorcantikmurah.com/file/wasorugorerisiworupofu.pdfIn PDF document text
    • http://auroraenergyproject.it/userfiles/files/49333176981.pdfIn PDF document text
    • https://tempatpasang.com/contents/files/64714826559.pdfIn PDF document text
    • http://soosanfix.com/upload/fckeditor/file/wukomoboko.pdfIn PDF document text
    • https://eclearusa.com/images/file/64140448694.pdfIn PDF document text
    • http://sarkar.ie/userfiles/file/futugatodewo.pdfIn PDF document text
    • http://www.sunriseacademy.in/ckfinder/userfiles/files/zotavare.pdfIn PDF document text
    • https://xn--fiqa735be48e.com/upload/files/24010099408.pdfIn PDF document text
    • https://blogsma.com/files/3257695071.pdfIn PDF document text
    • https://estatecambodia.com/htdocs/cljr/data/files/54385567964.pdfIn PDF document text
    • https://partnyor.az/userfiles/file/bujolejudisojom.pdfIn PDF document text
    • http://feedproxy.google.com/~r/Xvkpad/~3/4dZi1sgP-vI/uplcv?utm_term=gender+inequality+in+jobsPDF 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_off0000ed24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED24 18788 bytes
SHA-256: c3279d5906ef65de6ea46a35b82b48a96274f58c30690ee52103ff823defcefa
font_01_sfnt_off00011e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E43 10912 bytes
SHA-256: 1d446c930d267907552544dab72cd10c150618521a66559c73aee88759e2e783
font_02_sfnt_off0001376b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1376B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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