Malicious PDF — malware analysis report

Static analysis result for SHA-256 eac0bd6287ff3130…

MALICIOUS

PDF

70.9 KB Created: 2021-09-25 20:19:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 8eeac94780a53fa0ed1eaa7dbe34e4ce SHA-1: c5473badcb22ed390cd812a8abb13a78fa5cc312 SHA-256: eac0bd6287ff3130d594a52ca0569d51cd7f2e63cf7007c51d1a1fe53f000145
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or malicious content delivery attempt. The PDF contains a large number of embedded URLs, many of which point to disposable domains or are structured as link farms, suggesting a phishing lure or a mechanism to distribute further malicious content. No scripts were extracted, but the PDF structure and numerous external links strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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://drafthe.ru/uplcv?utm_term=can+we+use+two+truecaller+in+one+phone PDF link annotation
    • https://hamzakocakoglu.com/userfiles/file/kojunojixisezevozijow.pdfIn PDF document text
    • http://elvirajogsi.hu/ckfinder/userfiles/files/mipegopafuvewunuz.pdfIn PDF document text
    • http://kfoodntea.com/dataroom/file/sovegepozimoreletejeg.pdfIn PDF document text
    • http://jowinbio.com/upload/files/202109120122473375.pdfIn PDF document text
    • https://minhvuongthuphap.com/upload/ck/files/kibokomefi.pdfIn PDF document text
    • http://aquaclub.hu/userfiles/file/71590113737.pdfIn PDF document text
    • https://mcdelandes.ca/uploads/file/47475605343.pdfIn PDF document text
    • http://dnepropress.net/files/file/komugedirapubave.pdfIn PDF document text
    • http://imhang.com/fckeditor/userfiles/image/41384880396.pdfIn PDF document text
    • http://bjsixiang.com/jingkelun/userfiles/files/20210913034744.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/31f4e736246fa93e15e7ee3cbe7d5a4d/92455207803.pdfIn PDF document text
    • http://danceaction.be/userfiles/file/jegimoruremejali.pdfIn PDF document text
    • http://group-anons.ru/userfiles/files/45075136254.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/bakuzonosurata.pdfIn PDF document text
    • https://kozlovka.mebel18.com/uploads/files/86642037315.pdfIn PDF document text
    • http://www.520amis.com/upload/files/xizagagemijitazulavosa.pdfIn PDF document text
    • https://cingenito.ca/upload/editor/file/43459885630.pdfIn PDF document text
    • http://maksimetall.ru/files/45686914538.pdfIn PDF document text
    • http://saipanbooking.com/FileData/ckfinder/files/20210908_2BDB32F885D26408.pdfIn PDF document text
    • http://ansing.nl/userfiles/file/85765415344.pdfIn PDF document text
    • https://cytokin.ca/upload/editor/file/rejejupaxeba.pdfIn PDF document text
    • https://maintogelonline.info/contents/files/vasusiladefalom.pdfIn PDF document text
    • http://perfectionistpaintingnj.com/ckfinder/userfiles/files/lusuxebijuzozowumusomot.pdfIn PDF document text
    • http://tjjjsh.com/uploads/files/31336297207.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_off0000b0df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0DF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c8f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F1 17408 bytes
SHA-256: df1a276ba8e4001f8b82e518fc5d05090b134719cee2a7745c86d9c1e4d11122
font_02_sfnt_off0000f572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF572 10688 bytes
SHA-256: 3d514cd9e8d49df8edd389cdc112108bbbc93dd9f9d5f53c4656fe6ad94af626

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