Malicious PDF — malware analysis report

Static analysis result for SHA-256 1edf7d2ae2e98b43…

MALICIOUS

PDF

70.1 KB Created: 2021-09-29 01:24:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 588a6982d4d9ee45b10e372294d39157 SHA-1: 5061359db2fed6d75b1bee58a4630fa31c2fd579 SHA-256: 1edf7d2ae2e98b4399453fafc884de1b011caed9c8297e333d6d8c7baeea0e11
156 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ClamAV detection and ML classifier strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, but the structure and URL analysis point to a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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://gewidor-gmbh.de/uploads/files/20271676223.pdf
    • http://fotosvatba.net/userfiles/file/37025671634.pdf
    • https://prosaison.fr/userfiles/files/tifotujowavemarig.pdf
    • http://rjbmachinery.com/d/files/87921603505.pdf
    • https://ocloud.millionserenity.com/images/upload/files/3297523444.pdf
    • http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eac624ce68---bediso.pdf
    • http://ssaisarang.com/ckfinder/userfiles/files/26859657333.pdf
    • https://lacaune.hu/userfiles/file/lijisibexujekopeperav.pdf
    • https://inprovitmexico.com/ckfinder/userfiles/files/tazexemurusomu.pdf
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/161425be79093c---kiwixojuvegi.pdf
    • http://diagnosticaedilizia.com/userfiles/files/metosedokisiwab.pdf
    • https://arvikabc.com/images/uploadedimages/file/71822473031.pdf
    • https://www.pharmawell.eu/ckfinder/userfiles/files/39036681504.pdf
    • http://alexlunacoach.com/img/editor/file/32042919086.pdf
    • http://avstralianature.ru/ckfinder/userfiles/files/merefo.pdf
    • http://aktifbant.com/resimler/files/doludulufavenemodapo.pdf
    • http://luxcottage.ru/stroykamen/userfiles/files/povasojizatavaretivomiw.pdf
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/161520a1797383---37998234115.pdf
    • http://kemmurad.com/webroot/img/files/19634131009.pdf
    • https://almentispharma.com/ckfinder/userfiles/files/dolositerazarilajajig.pdf
    • https://patriciogaete.com/upload/file/21406411970.pdf
    • http://focalthai.com/file_media/file_image/file/64074064226.pdf
    • https://parquesanalbertohurtado.cl/ckfinder/userfiles/files/43278724315.pdf
    • https://cfbadalona.net/ckdata/files/jakebolaneme.pdf
    • http://alacarte-husum.de/userfiles/file/dukuluduxikekuwekop.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=watch+hobbs+and+shaw+full+movie+online+free
    • 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_off0000b0a8.bin
d98ccbb031128a512236039f7cf896493ce6553aeecab12b5819ddd76acdd455
pdf-font-stream PDF embedded font (sfnt) at offset 0xB0A8 15800 bytes
font_01_sfnt_off0000d895.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xD895 16792 bytes
font_02_sfnt_off0000f0ac.bin
aa00b0e6465c190345b917818fc5b4626bc6fbdb3fa3fc1f80a0e9ce7667ed91
pdf-font-stream PDF embedded font (sfnt) at offset 0xF0AC 11124 bytes