Malicious PDF — malware analysis report

Static analysis result for SHA-256 205178d9b942f160…

MALICIOUS

PDF

75.8 KB Created: 2021-09-12 16:55:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 08fcd720812501085b899ac6d51e408a SHA-1: 21d4ad604ebf6743d2cfce0ec16b2351d3f1c9a0 SHA-256: 205178d9b942f160f85391a7d5adc4c10b17603a2182f700cc72a6295c6fba7d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely involving exploitation or redirection to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

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://philabc.ru/uplcv?utm_term=captain+tsubasa+2+android+game+download PDF link annotation
    • https://pastelbuilders.com/userfiles/file/xabesozikixivok.pdfIn PDF document text
    • https://studio45.live/wp-content/plugins/super-forms/uploads/php/files/d780cokd1i4gvqmgpm67e7lvl4/motur.pdfIn PDF document text
    • https://zivotzaokny.eu/res/file/megubobomamokitatugewonog.pdfIn PDF document text
    • http://www.anaja-inter.org/public/file/gobej.pdfIn PDF document text
    • http://brilsports.ro/userfiles/file///gugexoruzekajoj.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/4godu5tbvn5g8e4o7jasmj2q9c/wekum.pdfIn PDF document text
    • http://phamtrangia.com/upload/files/bagewi.pdfIn PDF document text
    • http://marta-galan.com/files/varios/file/xixoxekisekeg.pdfIn PDF document text
    • http://vikingpaint.com/user_file/file/gobubetatetusovudip.pdfIn PDF document text
    • https://aviseco.ro/userfiles/file/tutesopikopakorawoxefu.pdfIn PDF document text
    • https://agriplan-rs.com/dados/ckfinder/files/63928720194.pdfIn PDF document text
    • https://360clothing.indicsys.com/home/www360cl/public_html/uploads/images/files/bokixatorejuf.pdfIn PDF document text
    • http://csc-vietnam.vn/uploads/userfiles/file/27696606244.pdfIn PDF document text
    • https://comtraining.cl/userfiles/files/49135073540.pdfIn PDF document text
    • https://oceanflowerhotel.com/uploads/image/files/gifegopevukeb.pdfIn PDF document text
    • https://distriparkbotlek.nl/userfiles/files/63542914185.pdfIn PDF document text
    • http://zuche0551.com/upload/file/70831808441.pdfIn PDF document text
    • http://townofwinslowin.com/flash/townofwinslowin.com/file/xudevumabesavosobifigope.pdfIn PDF document text
    • https://www.igescanada.com/ckfinder/userfiles/files/latobagalenubanesomupemap.pdfIn PDF document text
    • http://michellenevinracing.com/FCKeditor/file/89840337209.pdfIn PDF document text
    • https://bahispesinde.com/gnc/veri/_files/xoxizemomenarako.pdfIn PDF document text
    • http://fairway.cc/images/blog/file/lasuwotavogimugepuji.pdfIn PDF document text
    • http://www.musicboxpiano.com/contentfiles/sidifivilugudupo.pdfIn PDF document text
    • http://elitakhealing.com/ckfinder/userfiles/files/91954723256.pdfIn PDF document text
    • http://argentum.com/wp-content/plugins/super-forms/uploads/php/files/ve7g5qe002k1jb8ga9utlnbk4s/32835783535.pdfIn PDF document text
    • 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_off0000bed3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBED3 18732 bytes
SHA-256: 2ccaab9c19055ba8b55fc264af5090ef0dcbe2c5938451cecfb2e506531d52ce
font_01_sfnt_off0000eedd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEDD 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000106f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106F4 11212 bytes
SHA-256: 820ffb1638e297b71b263c12f82b47558a46a34734a08b54a6c7f5e5c23cecae

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