Malicious PDF — malware analysis report

Static analysis result for SHA-256 49225b78e4a404b2…

MALICIOUS

PDF

114.6 KB Created: 2021-07-25 03:49:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: 97eaf9f04fbbf4fedc3e4514c266d81a SHA-1: 227f9e485303d43e7c79346d6830ec00d831c826 SHA-256: 49225b78e4a404b208c2a03c1bb23b107050d563d44b32af172a306ddfdaf049
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080855d519e2---70125450994.pdf In PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/27901fa86332f47caf2c7027eab22e36/835305136.pdfIn PDF document text
    • http://aweibel.com/Photo/file/wopisojikilapef.pdfIn PDF document text
    • http://nguyenthaotech.com/upload/files/belowomejipakoruzoxovewip.pdfIn PDF document text
    • http://birminghamseaholmclass63.com/clients/75362/File/kizemibugodaxulimomu.pdfIn PDF document text
    • http://agrion.org/upload/fichier/doredugu.pdfIn PDF document text
    • https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/5d46d25e4a6f8b8ea2905d303f1fe5b4/duwepifal.pdfIn PDF document text
    • http://edu-family72.ru/content/images/uploads/file/mugiwagatafub.pdfIn PDF document text
    • https://www.synergyheart2heart.team/wp-content/plugins/super-forms/uploads/php/files/4i9kbg3h8utv83tcgihd6hstaa/54351882679.pdfIn PDF document text
    • https://curewelldiabetes.com/userfiles/file/75922196268.pdfIn PDF document text
    • https://muguet.fr/sites/default/files/file/migajedafumu.pdfIn PDF document text
    • http://tilestone-pools.com/i/File/podigalu.pdfIn PDF document text
    • http://hani-bee.com/userfiles/files/66513056221.pdfIn PDF document text
    • http://www.norestim.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160c18da16d047---58907522615.pdfIn PDF document text
    • https://pestresolution.pt/site/upload/file/75721989657.pdfIn PDF document text
    • https://tiklatakip.com/calisma2/files/uploads/98988871883.pdfIn PDF document text
    • https://aquafilling.com/userfiles/file/valugejebiwi.pdfIn PDF document text
    • https://netcsemege.hu/ckfinder/userfiles/files/jadodusejesaw.pdfIn PDF document text
    • https://thic.net/plugin/ce1/ckfinder/userfiles/files/71891375352.pdfIn PDF document text
    • http://projectcom6wrk.net/ckfinder/images/files/kesaxedepi.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/76420412765.pdfIn PDF document text
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/160816d92cf578---39210757898.pdfIn PDF document text
    • https://misionesmedellin2030.com/wp-content/plugins/super-forms/uploads/php/files/1ltus83gvemubr6t5pii4gr9sm/37989492126.pdfIn PDF document text
    • https://www.lorenzofranzone.it/wp-content/plugins/super-forms/uploads/php/files/494a01cfa74542e70f96d821c0b450f5/fetaxogogolifegedibapap.pdfIn PDF document text
    • https://www.mclarenpress.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dffb57da19---12512657641.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=arkham+knight+cheat+codesPDF 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_off00015ad4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15AD4 10844 bytes
SHA-256: 10748efca94e69724d6b6118c5416decde735143045f27cf5f5789cceafe3ada
font_01_sfnt_off00017383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17383 18580 bytes
SHA-256: 98fc96895e67558b65e988b07015124500c1674e69c58f3e0c04eb43b80907b8
font_02_sfnt_off0001a48a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A48A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1