Malicious PDF — malware analysis report

Static analysis result for SHA-256 be114562445904af…

MALICIOUS

PDF

85.6 KB Created: 2021-09-05 20:36:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e9572e85933d77c7c194a917b68e6f4f SHA-1: 44b1dae4c8a3c769bf2fa19df227d173a5d64e00 SHA-256: be114562445904af1126c0cb4fef675fe36f367cdcc92e7dd2f07881e87c7df6
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via embedded links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://eprobatdz.com/ckfinder/userfiles/files/mugokib.pdf In PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c785f9c4f8---58224085503.pdfIn PDF document text
    • http://beerskiboot.com/img/upload/file/67159528709.pdfIn PDF document text
    • https://www.bmo-agencement.fr/ckfinder/userfiles/files/96172571701.pdfIn PDF document text
    • http://tsg-edinstvo.ru/userfiles/file/zuvezixanekofefedoduv.pdfIn PDF document text
    • https://menlopark.com/wysiwygfiles/file/53161215829.pdfIn PDF document text
    • https://artesapanaderia.xyz/aym_image/files/3337254775.pdfIn PDF document text
    • https://nam.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607e354905b98---58363086098.pdfIn PDF document text
    • http://edilgroupdigiovanni.it/userfiles/files/29492208868.pdfIn PDF document text
    • https://ratsimae.ee/media/contents/file/kakabubibur.pdfIn PDF document text
    • http://tindangnhadat.vn/upload/files/vipuku.pdfIn PDF document text
    • https://alignerco.com/wp-content/plugins/super-forms/uploads/php/files/f3c4081f66b601872e49335a5455d00c/xakifovofugetitanage.pdfIn PDF document text
    • http://www.kindytennis.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611e695e3c50a---90178456306.pdfIn PDF document text
    • http://ty-universe.com/image/files/20210716_213410.pdfIn PDF document text
    • http://www.annaleehuber.com/content_files/file/58339112126.pdfIn PDF document text
    • https://www.eos.org.eg/ckfinder/userfiles/files/46986479524.pdfIn PDF document text
    • https://irepairplus.nl/app/webroot/files/userfiles/files/46763816052.pdfIn PDF document text
    • https://capitaleny.com/wp-content/plugins/super-forms/uploads/php/files/0942e9217b5060e98fbaa53081b8d3b2/sibozoxemazasamirenofigaz.pdfIn PDF document text
    • http://limpiasol.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea77bc21d3---sakuzaxobofunulutudujor.pdfIn PDF document text
    • https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/bd2aeabee52e89af5c1534b17b473685/somunitobap.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/16093fe8f935fc---savavibefuduzoronilodus.pdfIn PDF document text
    • http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe7bd7d1f1---45365101484.pdfIn PDF document text
    • http://petra-dario.info/upload/datoteke/96447798519.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/1608a207a4c78d---63333507207.pdfIn PDF document text
    • http://kino-cosmik.ru/sadm_files/kilasotokajubivimipitumo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=manures+fertilizers+and+agrochemicals+pdfPDF 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_off0000ea25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA25 11220 bytes
SHA-256: d25c392d25c2918bea057a360a848184cd9cfcab9bcaaf0fc712892288ccee6c
font_01_sfnt_off0001040d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1040D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011c1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C1F 17112 bytes
SHA-256: 42140c2fef08c5a69325e84b0ec753c23f9ab1a5df2572bb4fb5e200021caac0