Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe5c7e5d47eb3ecb…

MALICIOUS

PDF

79.4 KB Created: 2021-07-27 00:27:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 95e3a149b569e48808e9479f253c4189 SHA-1: 772eb7a41bc5018e5de70dda76042e24525f77a6 SHA-256: fe5c7e5d47eb3ecb0225042c2f2ed034768010a26253423f6f6482944831b3ba
156 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many of which point to compromised WordPress upload directories and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to phish or redirect users to malicious content. No scripts were extracted, but the structure suggests a link farm designed to distribute traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://srldirect.com/ckfinder/userfiles/files/fawivakijuputebapebewek.pdf In PDF document text
    • http://castanienfamily.com/clients/74558/File/58053133054.pdfIn PDF document text
    • http://abc-tel.ru/data/File/60752973673.pdfIn PDF document text
    • https://www.enterpriselighting.com/wp-content/plugins/super-forms/uploads/php/files/08cd73da157f25be8abe44943515d043/waluvejuri.pdfIn PDF document text
    • https://him-home.ru/wp-content/plugins/super-forms/uploads/php/files/6cfe0b88899dd9731df7cc601058c25d/70681158982.pdfIn PDF document text
    • https://wildnaturetravel.com/File/nuboduporoboposamor.pdfIn PDF document text
    • http://www.absolutecateringla.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4ea733f251---72400032185.pdfIn PDF document text
    • https://realestateconnect.us/wp-content/plugins/super-forms/uploads/php/files/fvl5lr9irtn0enbv542ifj4h75/47721545399.pdfIn PDF document text
    • https://arbormaster.net/uploads/files/nevedefavaluven.pdfIn PDF document text
    • https://thealloywheelcentre.co.uk/wp-content/plugins/super-forms/uploads/php/files/db2e5d3c505e4d9311abd7b784e3f952/gizozaminujegexuzomotiwul.pdfIn PDF document text
    • https://radiosmile.hu/upload/file/fujonopexibigudometejuzi.pdfIn PDF document text
    • http://builderall.info/userfiles/file/47716436181.pdfIn PDF document text
    • http://ttlengenharia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160839c1cb269d---litijibulexogurelati.pdfIn PDF document text
    • https://belgradenightlife.info/wp-content/plugins/super-forms/uploads/php/files/lk8p2646889ncfluo02rhkorcj/binubuk.pdfIn PDF document text
    • http://lhs75aa.org/clients/0/08/08eb77d093c5251d787cf05842b4a73c/File/97040447913.pdfIn PDF document text
    • http://tavernadelsnoguers.com/wp-content/plugins/super-forms/uploads/php/files/8120d542765f8e85dfb0281045047d79/wagonafosokigipo.pdfIn PDF document text
    • https://ppuhperspektywa.pl/files/edytor/file/5351312207.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/16098c610ba475---jamolomanudizerowu.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a725d77e1ae---tunabinilufakana.pdfIn PDF document text
    • http://drapikowski.pl/uploaded/fck_files/file/69926462154.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/watoxuxakotosuje.pdfIn PDF document text
    • http://southfieldhigh1973.com/clients/2/27/27a5067865c8334ad4a5a1fd7642c928/File/31985182777.pdfIn PDF document text
    • http://aliancegroup.su/wp-content/plugins/formcraft/file-upload/server/content/files/1609d55ccc0326---xewud.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BvfzZFkJO3s/uplcv?utm_term=adjectives+comparative+and+superlative+quizPDF 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_off0000d1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C9 11156 bytes
SHA-256: 5ecb3a30c850f1fe1f4c52859811a1219116d4bf8b1240eeabe035e1fde38420
font_01_sfnt_off0000eba8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBA8 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000103ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103BA 16972 bytes
SHA-256: c93f1ae5fae4e94c15f17e5e99663e69ba7f4c437503828d243032a708df406f

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