Malicious PDF — malware analysis report

Static analysis result for SHA-256 d45295f17465f3e4…

MALICIOUS

PDF

79.8 KB Created: 2021-09-13 19:28:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 78a7918953130e91ae61184a8af0caba SHA-1: a4098aa4cf199bcf1ae2dc2ee59041086512552f SHA-256: d45295f17465f3e4e3fdccba1b4b4a2396b88356849d1a6e7872213aba746bdf
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and is identified as a link farm pointing to compromised CMS uploads and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded JavaScript is a common technique for initiating malicious actions within PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://m-astar.com/UserFiles/files/1747461332.pdf In PDF document text
    • http://misterholidaysanprisco.it/userfiles/files/71995684186.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/3b1585cb67ead2fa45c30ecf72724dec/91762866892.pdfIn PDF document text
    • https://wodepcb.cn/uploadfiles/files/boxudele.pdfIn PDF document text
    • http://emilybarnes.com/DEVELOPMENT/VERSIONED/emilybarnes/trunk/sites/default/files/file/lejogifazelifajamokifumug.pdfIn PDF document text
    • https://msiutilities.net/documents/pidisajise.pdfIn PDF document text
    • http://makaifruits.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6927092fe---butuzevapalogivamiwebot.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1631408717_59d995dfe1.pdfIn PDF document text
    • https://rajatotogroup2.com/contents/files/deregokuvenabuzagekefoge.pdfIn PDF document text
    • http://dspec-car.com/js/upload/files/pabugezakagogogevovar.pdfIn PDF document text
    • https://lucky-erotic-massage-bucharest.ro/ckfinder/userfiles/files/30191214678.pdfIn PDF document text
    • http://ceroki.com/image/files/wasuzepitonojalofude.pdfIn PDF document text
    • http://avandcie-automation.fr/ckfinder/userfiles/files/zinakedabenekomufufi.pdfIn PDF document text
    • https://247christianity.org/fckeditor/userfiles/file/965408389541630760087.pdfIn PDF document text
    • https://firsatpin.com/calisma2/files/uploads/37276868587.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613648a6e8637---rojujogijavara.pdfIn PDF document text
    • http://honkakuji.jp/honkakuji/images/ckfinder/files/kawobujesivagerepafaxa.pdfIn PDF document text
    • http://erpsamik.com/ckfinder/userfiles/files/73100094517.pdfIn PDF document text
    • http://sanyosushiglendora.com/uploads/files/28412871615.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/fapamenadeluzadasi.pdfIn PDF document text
    • http://warmistore.com/userfiles/file/zategem.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=thop+tv+cricket+channelPDF 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_off0000d1a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A4 10424 bytes
SHA-256: d5b1a29574e24ab98b60f79c88f6cb6ab18e4439eefe7b66f774fe0709120a06
font_01_sfnt_off0000e93b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE93B 18772 bytes
SHA-256: 16ca7c6b6b5291eed3dc6572c93657582044482e0a53a92b40692029736c012a
font_02_sfnt_off000119ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119FF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1