Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ddbdf01eb2a08a…

MALICIOUS

PDF

78.1 KB Created: 2021-08-25 03:14:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 16ee1af8254acfdd5a74827a48b5f7b2 SHA-1: 0ffea84f2c9820a41a7d33838c923a1717adde21 SHA-256: 09ddbdf01eb2a08ad513e5bfa0064bfe1712c2141559b855425f818d117382ac
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple links to external resources, including a raw IP address and compromised WordPress uploads. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to download and execute a secondary payload. The presence of embedded JavaScript points to its use in exploiting the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://www.pointcookelectrician.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ff257e697d8---sujitozaretadizozavuzu.pdf In PDF document text
    • http://szao-spb.ru/images/news/file/76900038864.pdfIn PDF document text
    • http://127.0.0.1/bantraicay/js/ckfinder/userfiles/files/losisevogalesepe.pdfPDF link annotation
    • http://madang.eu/f_pds/fck/file/zagosa.pdfIn PDF document text
    • http://lavalnerina.it/userfiles/file/jabobilafixegagumuta.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/a16d6cea097bcb00f60208a7c69a82a2/lodinadoxenuxawoxuwevu.pdfIn PDF document text
    • https://heritagelogs.com/wp-content/plugins/super-forms/uploads/php/files/7fcb3o8c4lb9lej1kn2a8jth87/13921073893.pdfIn PDF document text
    • http://ciaooo.ru/uploades/userfiles/file/luteparumejimidonizuf.pdfIn PDF document text
    • https://bangprice.combangprice.com/beta/cms_image/file/volupu.pdfIn PDF document text
    • https://jpjplumbingandheating.com/FCKeditor/file/rasukogixenexujos.pdfIn PDF document text
    • https://polinagerz.ru/wp-content/plugins/super-forms/uploads/php/files/7jhmi987p7pm7ouugprgoa3k6h/jumipuxegoluje.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/q8ebucf0vklfnpm49no6td8l62/66797776170.pdfIn PDF document text
    • http://gagutp.com/sa_upload/userfiles/file/20210618223053.pdfIn PDF document text
    • https://duext.com/wp-content/plugins/super-forms/uploads/php/files/19c4db35992ec7475eb3d2b038517b6e/tuwedazekene.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=questions+to+ask+as+a+life+coachPDF 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_off0000cf26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF26 10584 bytes
SHA-256: 3478ab1dd61bd4bf40123ff91936ac7d5a46c95df3e6f162372765fd83da8a87
font_01_sfnt_off0000e765.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE765 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000ff77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF77 16552 bytes
SHA-256: 5b059c611b5b8fd6cf5919df22241e99d6d2aed7bf4c0f69007952cdeb49ccf5