Malicious PDF — malware analysis report

Static analysis result for SHA-256 f47da7f397498531…

MALICIOUS

PDF

84.8 KB Created: 2021-06-29 00:21:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: faa34fd7c7744512d23663edd770b6d1 SHA-1: ba6aec3ffcbb488882f74c38aeee5c57fc0e630a SHA-256: f47da7f397498531154045c42a028e5e1615aa26f0881a6bf8bf0ae96c5658c1
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a link farm with numerous URLs pointing to various websites, many of which are hosted on compromised CMS uploads or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to lure users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://foodchemsino.com/d/files/mirikiko.pdf
    • http://crystalnymph.by/wp-content/plugins/super-forms/uploads/php/files/622894b41d642d3e2743b646cc9ac7cf/navukegamugu.pdf
    • https://primewestelectrical.com/wp-content/plugins/super-forms/uploads/php/files/5338ecb4ab7794de77b4c5f3178f3a6b/kosagujegeguvevagopu.pdf
    • http://av-jet.ru/userfiles/file/wevonepiritadedumajapolav.pdf
    • https://www.kiakaha.gr/wp-content/plugins/super-forms/uploads/php/files/eo9293kamrl5lc6evphjj5c4k1/supujasosisopaxiwunoxebeb.pdf
    • https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ab895a778dc---54913696253.pdf
    • https://agribusiness.pk/wp-content/plugins/formcraft/file-upload/server/content/files/1607608fe50ea2---wawelifomurobunaxapo.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608cb439b01a8---vimolebolefi.pdf
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606d43576b9a0---limixikiwe.pdf
    • https://www.d-table.com/wp-content/plugins/super-forms/uploads/php/files/c382d177c09e17a4d5ce8f0a1ed7f155/86799841192.pdf
    • http://payassistinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609317f610bf0---jikujufajunilezu.pdf
    • https://cakesandcupcakes.net/userfiles/files/87425982035.pdf
    • https://stalbeckers.nl/userfiles/image/file/61696244704.pdf
    • https://floridaholidayplanner.com/wp-content/plugins/super-forms/uploads/php/files/cc177cab1fb99a2557d4d596d6cdc8a9/wazobazeboxopim.pdf
    • https://givemeit.ru/wp-content/plugins/super-forms/uploads/php/files/6b82fc59a3c958007a2d41030b9cb22b/zugul.pdf
    • http://www.zulfugar.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16090bb87af023---38548090270.pdf
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b7112c24b9---10027684001.pdf
    • http://www.realisthotel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf8375d298---91029439627.pdf
    • https://wlao.on.ca/wp-content/plugins/super-forms/uploads/php/files/e870108c331da24be607d6899bf128ca/vulitemexovamu.pdf
    • http://alituncer.com/userfiles/file/gikajelep.pdf
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c52f77de27e---54016295914.pdf
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16083ff3645251---54397881812.pdf
    • http://aldara-latinoamerica.com/userfiles/file/80119874679.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=calculate+ka+from+ph+and+molarity
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e633.bin
7c5c72b5763f0a5274f50441cc0f842802bb525fbcb47295c6e0acaa8aa98211		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE633 11056 bytes
font_01_sfnt_off0000ffc5.bin
68572079867f1154691371c9a749f76b50ea2bcce9c95f4507ea42ad4d54254c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFC5 17708 bytes
font_02_sfnt_off00012ea4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA4 16792 bytes

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