Malicious PDF — malware analysis report

Static analysis result for SHA-256 e48f240e88955eab…

MALICIOUS

PDF

88.1 KB Created: 2021-07-21 16:53:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 4b909fe1e2d8f943543b2c18e11a97e2 SHA-1: 864328a0090f39710bdea52b02a95b9bed297411 SHA-256: e48f240e88955eab070dfa5c68b87a21f30089aab74f146f8a985044282f65b1
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The sample is identified as malicious by ML classifiers and ClamAV, indicating it's a phishing or malware distribution lure. It contains embedded JavaScript and a significant number of external URIs, many pointing to compromised WordPress sites, suggesting an attempt to redirect users to malicious content. The PDF structure and numerous links indicate a link farm designed to obscure the final destination, likely a phishing page or a second-stage malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16092aba293b88---zewagufumugovoxux.pdf In PDF document text
    • http://forter.vn/hinhanh/file/40764958848.pdfIn PDF document text
    • https://homini.eu/wp-content/plugins/formcraft/file-upload/server/content/files/160976d20d3f10---fewuxivediximeti.pdfIn PDF document text
    • https://xn-----6kcabagcgfjsxjciriy6alkh6a7aqk.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/e69b3aa3c99e2f0601fdff8e8874c9d5/99988636171.pdfIn PDF document text
    • https://seataclightingalaska.com/wp-content/plugins/super-forms/uploads/php/files/8fdc036d1a803f91fad56d706b81adc4/zesekomusegi.pdfIn PDF document text
    • http://a1-automotivegroup.com/upload/files/48189811901.pdfIn PDF document text
    • http://megalabsrl.it/userfiles/files/nosifopavosemem.pdfIn PDF document text
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/xaxaxalenulixadu.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/47774055661.pdfIn PDF document text
    • https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/sbl1j8ser5a3oobmtgl36rcdf3/rixokamalerajid.pdfIn PDF document text
    • https://circolodelpistone.ch/userfiles/file/bupofobiwo.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/146128eaba0842de0ff8f336b31649f1/64617234641.pdfIn PDF document text
    • https://www.guestquesttravelmedia.com/wp-content/plugins/super-forms/uploads/php/files/njvomgcj31fkrrvckck1qlfu1l/nivavaganarofijakasax.pdfIn PDF document text
    • http://pazzo.jp/js/upload/files/56018378181.pdfIn PDF document text
    • http://msci.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/16099ab56b25b4---64076038716.pdfIn PDF document text
    • https://vildmarksjagt.dk/userfiles/file/nitafibejowawisikenijijo.pdfIn PDF document text
    • https://ajitcoatings.com/uploads/reparademovasefexovenimi.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082e7a9caf20---sepajeberi.pdfIn PDF document text
    • https://www.toptalentusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080a1a262489---48696662392.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f9e214d6ee---21061372162.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/dfe31a2adad137e1d4b0011fde86c1cb/10391528049.pdfIn PDF document text
    • https://spazmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a497bf15504---kiralugekutumaliwodi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=normal+cholesterol+level+for+femalePDF 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_off0000f479.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF479 10448 bytes
SHA-256: 6ff9256e5f2bfdd08628b35813822721d00f0674c28ac5691293e8cd15caf207
font_01_sfnt_off00010c48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C48 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001245a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1245A 17112 bytes
SHA-256: 0348595ccd662b9936fe4cabaf8064a83fbab9dbb2d0238c075883ab2decf3ee

Open this report in the interactive analyzer, or submit your own file for analysis.