Malicious PDF — malware analysis report

Static analysis result for SHA-256 25c05a0ec9ded62b…

MALICIOUS

PDF

87.1 KB Created: 2021-07-05 13:29:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 9374258a963dbdf66e4aade7e095ba03 SHA-1: dd8e2ba481638a7188baf68c1cd89f5672886b9c SHA-256: 25c05a0ec9ded62b7863254987c27224039e9436446a59d6d960e90ba3311fa4
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of a link farm hosted on compromised CMS uploads and disposable domains suggests an attempt to lure users to malicious sites. While no scripts were explicitly extracted, the PDF structure and link farm indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://musorcentrum.hu/files/article/file/jisemesoramufofojakoril.pdf In PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/ede6dfa193799972cd115ecfd99053e6/30175266293.pdfIn PDF document text
    • https://pyhm.ca/wp-content/plugins/super-forms/uploads/php/files/5b6vqmit56pf55u1b2e3sktlsg/11465588756.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfeefaee421---wasakagowobobe.pdfIn PDF document text
    • https://www.phoenixdentalacademy.co.uk/wp-content/plugins/super-forms/uploads/php/files/ed79c72b72d9e6e3b70d0ab88f5796c2/marirovelu.pdfIn PDF document text
    • http://bjeclinic.com/ckfinder/userfiles/files/gumetotevivovosewuk.pdfIn PDF document text
    • http://robalton.es/Albums/images/file///nadudigafajuzotemeti.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/98533595843.pdfIn PDF document text
    • http://manixcnc.com/ckupload/files/95415719685.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/lakodizefuwajezusig.pdfIn PDF document text
    • https://alrukn.co/userfiles/files/4329601962.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e08963d1ef3---23572789491.pdfIn PDF document text
    • http://www.tif.cn/wp-content/plugins/super-forms/uploads/php/files/dot855o589103ep0r921qstkua/fufejamopowobekex.pdfIn PDF document text
    • https://sdyh.gr/wp-content/plugins/super-forms/uploads/php/files/cb79sob3gok9nbf6vnqe46ndn7/35754279464.pdfIn PDF document text
    • https://www.truegridpaver.com/wp-content/plugins/super-forms/uploads/php/files/9a039661516ead90029372fc2692131d/71659213903.pdfIn PDF document text
    • https://actor-conseil.com/files/file/5033633098.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bb2f6fa62c1---50470685003.pdfIn PDF document text
    • http://netinflux.net/userfiles/file/15891716965.pdfIn PDF document text
    • https://semineebrasov.ro/printuri-fi/files/47607546260.pdfIn PDF document text
    • http://ipceurope.com/assets/file/wilewakomujasewilobolazil.pdfIn PDF document text
    • https://pjkconstruction.ca/images/file/25210522670.pdfIn PDF document text
    • https://siyata.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/16084a98817cb2---dedos.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=the+long+term+assets+that+have+no+physical+existence+but+are+rights+that+have+value+is+known+asPDF 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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ee71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE71 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010683.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10683 17052 bytes
SHA-256: 199735ce4a24b82021357c75ad7d055454909e15808b76463e2525dea75bae28
font_02_sfnt_off00013337.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13337 11484 bytes
SHA-256: 429db92621b8ce536686be070b8d0e544a40e38fb9e81fa36d3723213ceca71a

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