Malicious PDF — malware analysis report

Static analysis result for SHA-256 c630546aca9d8aa4…

MALICIOUS

PDF

95.8 KB Created: 2021-09-06 17:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 65ec1f0b16cc65ce95f6d29661aa7d7d SHA-1: 7673795cb65392fe07b282783aa1a67539ff7a36 SHA-256: c630546aca9d8aa41289c5744ba14b9c0cb35192c3ced85697d020a3944899e7
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file is classified as malicious by ML and ClamAV, and exhibits characteristics of a link farm. It contains numerous URLs pointing to compromised WordPress uploads and disposable hosting, disguised as a legal document. The primary attack pattern involves luring users to these external sites, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 http://the-bom.kr/upfile/files/bexiwobubozekinopawa.pdf In PDF document text
    • http://shimamura-mail-order.com/userfiles/file/lewudibanaw.pdfIn PDF document text
    • http://munnarinfo.in/userfiles/file/wisomo.pdfIn PDF document text
    • http://fotostudiovaccari.it/userfiles/files/dakuxerofumake.pdfIn PDF document text
    • http://asude.istanbul/ck_images/files/18217140593.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/16084d3324be70---8278338027.pdfIn PDF document text
    • http://www.insurancedirectcanada.ca/wp-content/plugins/formcraft/file-upload/server/content/files/16094c16b1e04d---benalidutalaz.pdfIn PDF document text
    • http://studiotecnicoforace.eu/userfiles/files/mubiluboxijikimef.pdfIn PDF document text
    • https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/bc941412775ef242f304f5c3a70b7d47/wupubufi.pdfIn PDF document text
    • https://k2salight.com/wp-content/plugins/super-forms/uploads/php/files/681f1b7aba668bcddd1c75c55f2c199c/pesenodeginikisoju.pdfIn PDF document text
    • http://alice-immo.com/userfiles/file/19882167998.pdfIn PDF document text
    • http://alibabashipping.com/userfiles/file/38847073152.pdfIn PDF document text
    • https://www.18fire.com/wp-content/plugins/super-forms/uploads/php/files/36470255231f9270a1b445d500b030f6/18747729267.pdfIn PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078d8b1037a8---virumolisajapiji.pdfIn PDF document text
    • https://tolgyesvolgy.hu/userfiles/file/576686449.pdfIn PDF document text
    • http://boissee.fr/userfiles/file/darisuriw.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/862def0a22e47d4e313eccba56656b03/rixagafenero.pdfIn PDF document text
    • http://www.hussco-steel.com/husscofiles/files/76445586542.pdfIn PDF document text
    • http://scan3dsaigon.com/upload/files/16602779247.pdfIn PDF document text
    • https://equalland.com/uploads/File/83511542763.pdfIn PDF document text
    • https://fontaine-eva.fr/userfiles/files/zamemovabo.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/03632cebeba58a4d3af35a526ca941a0/womaziruna.pdfIn PDF document text
    • https://zhongzing.com/uploads/files/202109030652012390.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=supreme+court+judgement+on+school+fees+pdf+2019PDF 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_off00010c0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0E 19280 bytes
SHA-256: dfc85ff857991c6a47c38f1f9ed98675b191bfd434bad8234ed724b887008e9b
font_01_sfnt_off00013e59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13E59 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00015670.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15670 11580 bytes
SHA-256: a9328dadf918b08fcf2527ab2ddb98b441c34e52de41210860776be60162c5cc

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