Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae7023558c36f5e…

MALICIOUS

PDF

227.6 KB Created: 2021-06-29 13:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: a2e19488d789816fd43202b636cd0f8d SHA-1: be5752e81752e0a81d509a54234aa14d18f864bd SHA-256: bae7023558c36f5e89e23e5eaca2b1730b37fb388a82ff4f8e7a9093791f5555
166 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains numerous links pointing to compromised CMS upload storage and SEO redirectors, suggesting a phishing or malware distribution lure. The presence of external URIs and compromised links indicates an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9928

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
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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.
  • 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://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160abd19368a27---nuwexowe.pdf In PDF document text
    • http://podiummoda.ru/userfiles/file/16561255704.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/5ai3tq6u0bprjj57agc6gnekti/10478526962.pdfIn PDF document text
    • https://divinenine.net/userfiles/file/rizelakomabim.pdfIn PDF document text
    • http://gmei.lt/ckfinder/userfiles/files/gumadujuxikidobo.pdfIn PDF document text
    • http://mobydick-band.de/fckdata/file/81588205451.pdfIn PDF document text
    • https://amiablediamonds.com/wp-content/plugins/super-forms/uploads/php/files/2e2145ceb731a69ecea0433ec4cc2bca/85967039337.pdfIn PDF document text
    • https://giorgiosantinelli.it/file/44905339819.pdfIn PDF document text
    • https://topclassgreenery.nl/images/file/78924920872.pdfIn PDF document text
    • http://healthywithhart.com/res/file/nukovetinolaros.pdfIn PDF document text
    • https://markzone.az/wp-content/plugins/super-forms/uploads/php/files/i0siqpoejjnqlsqe4a0f56i73p/raxebupu.pdfIn PDF document text
    • https://mymovingestimate.com/wp-content/plugins/super-forms/uploads/php/files/50f0f39cbed6ac1ab9897915e07c56c4/93042211107.pdfIn PDF document text
    • http://doubletroubels.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe2d2cacd6---varozotiwos.pdfIn PDF document text
    • http://call.ae/wp-content/plugins/formcraft/file-upload/server/content/files/160722d8349e4c---48921499549.pdfIn PDF document text
    • https://rsun.pro/admin/ckfinder/userfiles/files/15477272928.pdfIn PDF document text
    • http://kashima.cc/userfiles/file/56091944897.pdfIn PDF document text
    • https://www.isgs.org/wp-content/plugins/super-forms/uploads/php/files/5f3736ff862591eee332d3a469bac703/14607535200.pdfIn PDF document text
    • https://wccia-vastu.com/wp-content/plugins/super-forms/uploads/php/files/062aa28e0923fc80d2c2e1265d5d15b4/23679099374.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/ce858a33ju64s47lag0r9ande0/81887522564.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ca6e072ba2---21967189399.pdfIn PDF document text
    • https://www.freshstartdigitalmarketing.com/wp-content/plugins/super-forms/uploads/php/files/4935983dd3c003887c5099ee3caec360/wukabirekefotuxo.pdfIn PDF document text
    • http://recamonde.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160829f63a8bb8---fosamasefajibesafab.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=quotation+for+evil+to+prevailPDF 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_off00031fb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31FB9 18972 bytes
SHA-256: b80e465d427f3d3e48ffbdac8e5293926d52e2b087c1dcbfa837174228f11a06
font_01_sfnt_off0003503f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3503F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00036856.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36856 10408 bytes
SHA-256: 1598c6bbdc65ab09314d7ce6ae26c4fc393d352aeb8741e550e5c588bccdfa19

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