Malicious PDF — malware analysis report

Static analysis result for SHA-256 347e548db2be31af…

MALICIOUS

PDF

78.9 KB Created: 2021-09-04 14:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 28692b868a70f9866584ff400ca2d640 SHA-1: f9f7106d968606aea596142a8ab0cefbb07a7593 SHA-256: 347e548db2be31af334b50be680ff25c8a0b8402241c9c40ca8462d10b0723fd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm with numerous URLs pointing to potentially compromised WordPress uploads and disposable hosting, indicating a phishing or redirection scheme. The ML classifier and ClamAV detection strongly suggest malicious intent, likely to lure users to malicious sites for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://hodgesmageefamilyreunion.com/clients/c/c9/c95619ca3ec29dd030dc8935b97378d4/File/bemulixulonalezeluvojotav.pdf In PDF document text
    • http://thephinhmienbac.com/upload/files/45372024165.pdfIn PDF document text
    • http://bizbecho.com/pa/trainstation/uploads/image/file/22393424321.pdfIn PDF document text
    • https://bursac.net/userfiles/file/vonudimugodiwogulubes.pdfIn PDF document text
    • https://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/1nhes81s54ihf1d2t4rosfndv2/94420747855.pdfIn PDF document text
    • http://monarchiaerembolt.hu/tmp/remiximapikigikubuvoni.pdfIn PDF document text
    • https://braintreeclinics.com/app/webroot/img/files/davemifuxemired.pdfIn PDF document text
    • http://palami.by/images/file/jaxerijetasad.pdfIn PDF document text
    • http://moestuinwebshop.nl/userfiles/file/39782583422.pdfIn PDF document text
    • http://beastyenergy.com/userfiles/file/zonid.pdfIn PDF document text
    • http://minisadik-margaritka.ru/admin/ckfinder/userfiles/files/suwugukutemapuk.pdfIn PDF document text
    • https://heykidsletscook.info/wp-content/plugins/super-forms/uploads/php/files/f195a2703b8f9f8d0aa641da854751cf/tosokutewero.pdfIn PDF document text
    • http://thinhhoanggia.vn/Images_upload/files/lazusebara.pdfIn PDF document text
    • http://westboroughhigh76.com/clients/b/bc/bc4984db1d461a603911d7e4814e3e59/File/tupuvilezuroxalejiwox.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/jv763u9dkletauuhrn22a6dmtc/votipurulipil.pdfIn PDF document text
    • https://lasanisports.com/files/jadafe.pdfIn PDF document text
    • http://anhuizpyy.com/upload_fck/file/2021-4-30/20210430121657649953.pdfIn PDF document text
    • https://www.ideaklinikbursa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160823224c19d1---58838443749.pdfIn PDF document text
    • http://rinsacars.com/files/others/57837535005.pdfIn PDF document text
    • https://mimpiindah2.com/contents//files/65007707949.pdfIn PDF document text
    • https://www.hontoys.com.au/wp-content/plugins/super-forms/uploads/php/files/cliqa0nc9q59hoq6f4ll06k8fo/wamatomekatepowinenuse.pdfIn PDF document text
    • https://villatoscana-pi.it/userfiles/file/76919029475.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c92fb14d83---toxulovebifujabes.pdfIn PDF document text
    • http://skoleniridicubrno.cz/ckfinder/userfiles/files/55855189489.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=cisco+linksys+e4200+manual+pdfPDF 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_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 11240 bytes
SHA-256: f03bff241752fa03252afe525edf111cd0bf0cc18502981f5f9825c4c5a6e010
font_01_sfnt_off0000e7af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7AF 17468 bytes
SHA-256: 36f6747720a7214e8ae4c3d5ef9e8454865f8f50c18fedcfed9151fc51f1abe8
font_02_sfnt_off0001143b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1143B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1