Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e03db483f9384dc…

MALICIOUS

PDF

71.8 KB Created: 2021-09-02 20:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 34ff1c42855b8ddcae2349288a8964cf SHA-1: 8d9af32d401ce33eb00fc409a9d9722d7a7e4783 SHA-256: 3e03db483f9384dcacfc7e223811c53bad631e8275b1e88ff506249043e9b9aa
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised websites, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/f73601cf876afad12eeefffaa6384348/nutulilowinafalisi.pdf In PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1609921b3c08d8---87950459180.pdfIn PDF document text
    • http://mgmkt.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16070706477762---19444939340.pdfIn PDF document text
    • https://www.rockfallco.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbad5010d9---15905024606.pdfIn PDF document text
    • https://istanajp.com/contents//files/7055152825.pdfIn PDF document text
    • http://www.cerel.eu/images/wyswig_images/file/82824700216.pdfIn PDF document text
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/936a0a6b2bc0d736f762543d0c64583f/23204025851.pdfIn PDF document text
    • https://hmanagement.net/userfiles/file/tiferojuzitisar.pdfIn PDF document text
    • https://www.engltg.com/wp-content/plugins/super-forms/uploads/php/files/83f1a818958db8bed00c59714daeec40/31444925567.pdfIn PDF document text
    • http://xn--om2b25zm6igqb.com/ckupload/files/fupubufevo.pdfIn PDF document text
    • http://www.goataxiservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc5b9c27ebe---91271752226.pdfIn PDF document text
    • https://big-cash.de/wp-content/plugins/super-forms/uploads/php/files/o0g35ak5bifcoqm0dtb7pnrh35/sokexejojivifujodajatamin.pdfIn PDF document text
    • http://arabstina.com/ckfinder/userfiles/files/fevedupinot.pdfIn PDF document text
    • http://in-dapt.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090aaf448896---84265527719.pdfIn PDF document text
    • https://zweefvlieg.net/userfiles/file/lolijupiwo.pdfIn PDF document text
    • http://phongkhamtamthan.net/uploadeditor/files/39311478656.pdfIn PDF document text
    • http://hoteldarim.ir/basefile/hoteldarimir/files/68697266879.pdfIn PDF document text
    • http://xn--b1akwe.xn--p1ai/userfiles/file/38868154894.pdfIn PDF document text
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/fvqhifjn4necr17uigq218i2k1/49052542878.pdfIn PDF document text
    • http://aurora-c.jp/files/files/89115954490.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e7c9bb50d69---nokegusemugujabogek.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/FevRqgeaUVY/uplcv?utm_term=chauvin+arnoux+ca+6472+manualPDF 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_off0000b0ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0EE 10812 bytes
SHA-256: 2559289880f09cc048cd83cb0e62c8cba0274d4eea18c7ec0c4c2a92cd15cd67
font_01_sfnt_off0000c9c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9C6 18232 bytes
SHA-256: 0e942755805d2409e7dee75fd5d388937788e1a976273de6080c4a06cadeb673
font_02_sfnt_off0000f84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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