Malicious PDF — malware analysis report

Static analysis result for SHA-256 cee59424066e0f73…

MALICIOUS

PDF

91.1 KB Created: 2021-07-02 05:26:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 4e6c211069fdd1c2a8653c2354f5d346 SHA-1: daf73b6af5ccb54efe049634f27f0826da01e3eb SHA-256: cee59424066e0f73fc4dd6dc00db8133703420a42befb205c80f7ec71743713d
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains a large number of links pointing to various websites, many of which appear to be compromised WordPress installations or disposable hosting, suggesting a phishing or malware distribution campaign. The document body is heavily obfuscated and unreadable, but the presence of numerous external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicate a strong intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://coretry.ru/uplcv?utm_term=how+to+convert+pages PDF link annotation
    • https://studiovizia.com/webroot/img/content/files/97939478914.pdfIn PDF document text
    • https://ludifrance.fr/userfiles/file/leganizixomibaralurez.pdfIn PDF document text
    • https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/db0e37af1d64693d6db53277fb3216eb/gifiripososa.pdfIn PDF document text
    • http://pck.malopolska.pl/wp-content/plugins/super-forms/uploads/php/files/8eb011747700a4c5bbfefa503309c51f/24069716360.pdfIn PDF document text
    • https://mumegram.com/userfiles/file/79305143763.pdfIn PDF document text
    • http://digifast.cz/userfiles/nejarovezarixibugilaziru.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/jakesubada.pdfIn PDF document text
    • http://www.iso-clean.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609fdbf076d91---vazanarujejerelaz.pdfIn PDF document text
    • https://caravanandre.it/wp-content/plugins/super-forms/uploads/php/files/c65924fd7d4b818e77e8ca6c07f70200/30818732099.pdfIn PDF document text
    • https://fiambreszav.com/wp-content/plugins/super-forms/uploads/php/files/a932e26294aad9ed9857c363fbb5e210/15405007550.pdfIn PDF document text
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/cbd98c62508baed448703145cc554ccd/bekidijevobaf.pdfIn PDF document text
    • http://eurekaelearning.com/upload/news/file/33089460686.pdfIn PDF document text
    • https://investainternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce45d8169b---poranob.pdfIn PDF document text
    • https://thehamptonsbloomington.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753e5154887---43757605375.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/5evql49vd0fmfjlcffb9mhdnn2/89046632027.pdfIn PDF document text
    • http://hifimarkt.eu/kunden/kronhardt/ckfinder/userfiles/files/15359559057.pdfIn PDF document text
    • http://jfac.kr/ckfinder/userfiles/files/mewola.pdfIn PDF document text
    • http://networkinglikepro.com/ckfinder/userfiles/files/36025379785.pdfIn PDF document text
    • http://principessavencanice.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080f74fd7b20---49542258605.pdfIn PDF document text
    • https://www.potterycommercials.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160cf1dd003837---37647106566.pdfIn PDF document text
    • https://arenda1s.ru/wp-content/plugins/super-forms/uploads/php/files/27a61196cdc8427ab44b96e0e2e6f80b/12513299061.pdfIn PDF document text
    • https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/mni8r12eu1d6iicu7ctf4fg736/89260489506.pdfIn PDF document text
    • https://eyestech.in/wp-content/plugins/super-forms/uploads/php/files/fbh67jpet0uh6ve5rp37dpvmvo/dizerovotesemabotewufito.pdfIn PDF document text
    • http://allegroescrow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608095d2a6e3b---83567503656.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

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_off000101c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101C3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000119d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119D5 17560 bytes
SHA-256: 673427064bae453d1f7bfc448d937728bb0db8d4085e6eb1ab3ea20bbbee137c
font_02_sfnt_off00014738.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14738 10552 bytes
SHA-256: e749f69893ecf7a54ba1329d108f80dd4510960f2f6953a131d3f6046ed1a6e4

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