Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0bec291a0826024…

MALICIOUS

PDF

89.6 KB Created: 2021-09-04 23:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 89db46e9dbbec7830b0997f7702d1a4f SHA-1: 38e074fc62d00af8066b677f82fa35fd1fd24791 SHA-256: b0bec291a082602472d1590c1aa9cb15d8752f970bec70fac680e8c41f821b79
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The file functions as a link farm, containing numerous URLs pointing to compromised websites and disposable hosting. These links likely serve as lures for phishing attacks or to distribute further malware. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

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://retake.dk/ckfinder/userfiles/files/81023722794.pdf In PDF document text
    • http://lactopad.com/uploads/files/75718590040.pdfIn PDF document text
    • http://royalwedding.jp/images/blog//file/80251212544.pdfIn PDF document text
    • https://arihantgranites.in/wp-content/plugins/super-forms/uploads/php/files/2ima2dm8t248e8ua71cgpj3m22/jujutuwukuwepe.pdfIn PDF document text
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/e00207b7d2bbc777705812e36f6df65d/84270717206.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/667a8f0a0580ee836e7855bc64867384/bezurojofipopafakuxa.pdfIn PDF document text
    • https://www.rydalmereprestige.com.au/wp-content/plugins/super-forms/uploads/php/files/3gk404jkme1gipbhb49abd102n/wijidik.pdfIn PDF document text
    • http://www.siscard.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b664c986107---lowekozewaraxujufipi.pdfIn PDF document text
    • https://cavalier-hundezucht.ch/userfiles/file/13913308762.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f4d4233d25---80539263103.pdfIn PDF document text
    • https://adsbudget.net/userfiles/file/zodimosasexoxelus.pdfIn PDF document text
    • http://www.homefacelifters.com/wp-content/plugins/super-forms/uploads/php/files/a0346a035b268b3e2cbddb1bf6729207/53138252196.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/1608d95927a165---rajutebafab.pdfIn PDF document text
    • http://tajesink.com/Uploadfiles/files/tizitefojijobir.pdfIn PDF document text
    • https://divinesacredshakti.com/wp-content/plugins/super-forms/uploads/php/files/060c743066ccd9a6ebfdf4f9dc912e72/zuvomuwilokipobusapudome.pdfIn PDF document text
    • https://www.elementstraining.co.uk/wp-content/plugins/super-forms/uploads/php/files/pmjvn032ud9ca491da8taeg7i2/75750948559.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d6de0aa53f6---44115014464.pdfIn PDF document text
    • https://www.shopveriamici.com/wp-content/plugins/super-forms/uploads/php/files/vsif03jpbbpdsbe8hhg2fj32uk/wutotukatuwobimo.pdfIn PDF document text
    • http://sklepjola.pl/userfiles/file/9095853740.pdfIn PDF document text
    • https://incoyun.com/calisma2/files/uploads/fefefutipadusugitubep.pdfIn PDF document text
    • http://sgyscom.com/upload_fck/file/2021-8-4/20210804013341243908.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=arrugas+paco+roca+pdf+gratisPDF 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_off0000f282.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF282 20312 bytes
SHA-256: b1d342084bac9c37a17446040b36faef672e57814dcebf2c3ee88bc63895bbb5
font_01_sfnt_off000126f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x126F0 10592 bytes
SHA-256: b88aa0769217fc950753becbda84f0b5e6b1f2531ae154c982f3803d7b69f088
font_02_sfnt_off00013f13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13F13 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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