Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed390484e417b75b…

MALICIOUS

PDF

83.4 KB Created: 2021-09-21 03:27:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2ac1a8625763b3189d10e25f58241a50 SHA-1: 12adc864a41b4de2022dcba9f68ea0c18278967e SHA-256: ed390484e417b75b6b6cfeeca6ac94ad038a91ad2b0706085d7ad196ac2b1c0f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, indicating a high likelihood of malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the document is designed to host numerous links on disposable domains, a common tactic for phishing or distributing further malware. While no scripts were explicitly extracted, the presence of many unknown URLs points towards a potential redirection or download mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://normec-cm.com/ckfinder/userfiles/files/75811138857.pdf In PDF document text
    • http://quesnelbusinessnetwork.ca/userfiles/file/78556963683.pdfIn PDF document text
    • https://spacio.hk/attachment/file/wewewazareja.pdfIn PDF document text
    • http://polyalpan.hu/_user/file/woludor.pdfIn PDF document text
    • http://balone.net/_upload/file///kusojebuj.pdfIn PDF document text
    • http://kientrucphatloc.com/upload/files/19703879521.pdfIn PDF document text
    • https://graphicart.ro/fckfiles/file/13057529813.pdfIn PDF document text
    • https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16145889361cd3---69203884421.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/butexenubo.pdfIn PDF document text
    • http://jtravel.clickis.kr/FileData/ckfinder/files/20210902_C54CBD250E09C047.pdfIn PDF document text
    • http://paillasse.hu/userfiles/file/puwugonifatefodenefu.pdfIn PDF document text
    • https://eownauto.com/uploadpic/files/gilivoxeti.pdfIn PDF document text
    • http://www.aceitunasdelguadalhorce.es/ckfinder/userfiles/files/gebotemutipep.pdfIn PDF document text
    • https://astdubai.co/userfiles/files/jegabidonaxebavaso.pdfIn PDF document text
    • http://smartdeal.pl/files/upload/files/bilofasiwibikevonukabo.pdfIn PDF document text
    • http://xn--90afqerdlt1f.xn--p1ai/admin/ckfinder/userfiles/files/witojolisudavige.pdfIn PDF document text
    • http://xn----dtbsgbucafmmaf.xn--p1ai/servimages/editor/files/pasodume.pdfIn PDF document text
    • http://studiotecnicodavico.eu/userfiles/files/zofeve.pdfIn PDF document text
    • http://babijie.com/upload_fck/file/2021-9-11/20210911234541142397.pdfIn PDF document text
    • http://dopuskvsro.ru/UserFiles/13270612469.pdfIn PDF document text
    • http://scantech3d.com/files/72708923663.pdfIn PDF document text
    • http://www.1atlanticfunding.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614045dc22c38---ninokinejifom.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=manager+games+iosPDF 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_off0000e0d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0D1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f8e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8E3 18512 bytes
SHA-256: 22cc4d21c721a4e0f48b905d3b6f428916b1b969f353612bb381e6ef9e6d7d06
font_02_sfnt_off00012902.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12902 10300 bytes
SHA-256: 7298e8c90450245806f1fcea0acb52eb10e6a9d4abd54e417677df9f2fdf191b

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