Malicious PDF — malware analysis report

Static analysis result for SHA-256 1d7f287386602310…

MALICIOUS

PDF

81.3 KB Created: 2021-09-09 17:13:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 48e0cc7e7293bb5173c05d14e1e2e589 SHA-1: 8059f78b46331dd64b440349a51397aa3c4bea2a SHA-256: 1d7f287386602310c61b3f8ef11e9f74fd55b0b28845ac4ca2e0b4a894c71166
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and an ML classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple domains, several of which are hosted on compromised CMS uploads, suggesting an attempt to distribute malicious content or conduct phishing. While no scripts were directly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

Heuristics 7

  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://bindashnews.com/userfiles/file/xodinodedizeraxodagatib.pdf In PDF document text
    • https://ntpuvoice.com/ckfinder/userfiles/files/rixubovew.pdfIn PDF document text
    • http://charontrade.hu/data/file/kabiwuwifepakutifemorix.pdfIn PDF document text
    • https://thefertilizergranulator.com/d/files/76501113505.pdfIn PDF document text
    • https://livre-art.com/ckfinder/userfiles/files/53348197281.pdfIn PDF document text
    • http://hycxchina.com/filespath/files/20210904142731.pdfIn PDF document text
    • https://genegurumiraclehealer.com/userfiles/file/95667021803.pdfIn PDF document text
    • http://decaiyun.com/upload/file/210909014252731027l8bveho1tu0f.pdfIn PDF document text
    • http://www.kocay.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1613475a31ad28---mikasivelalolibaliripex.pdfIn PDF document text
    • http://albertopizzetti.it/userfiles/files/5527997402.pdfIn PDF document text
    • http://www.scmphotography.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a040286ca4---fekevapowizami.pdfIn PDF document text
    • http://homeopathyhongkong.cn/files/23116450686.pdfIn PDF document text
    • http://terfigyelokamera.info/files/file/24614066122.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/b9f369d0105f3dd29925a0a444b45186/pefovebokigaxurer.pdfIn PDF document text
    • http://5thaveseniors.org/userfiles/file/wekozewezazunigaz.pdfIn PDF document text
    • http://guchen.ru/d/files/89119081237.pdfIn PDF document text
    • http://usmleworkout.com/files/file/zigiwef.pdfIn PDF document text
    • http://mg001.cn/upload_fck/file/2021-9-3/20210903035248421020.pdfIn PDF document text
    • https://mn-lawfirm.com/box/userfiles/file/31141695524.pdfIn PDF document text
    • https://www.casestilistas.es/ckfinder/userfiles/files/97947237923.pdfIn PDF document text
    • http://chothuexehochiminh.com/userfiles/file/7566648149.pdfIn PDF document text
    • https://dampinggame.com/calisma2/files/uploads/93435941881.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=transferring+data+from+ios+to+androidPDF 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_off0000d886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD886 10612 bytes
SHA-256: b9c3cf6e7b9b946397c2463e9389e1415aeb5dec23f93f0f5d40d6c3a9d67b27
font_01_sfnt_off0000f095.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF095 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000108a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x108A7 18028 bytes
SHA-256: f5759b8cf8182aff4a5f428a2025fac7610fa08923043d122bda6796e8e870fc