Malicious PDF — malware analysis report

Static analysis result for SHA-256 0eb4fa394251fd36…

MALICIOUS

PDF

92.2 KB Created: 2021-09-15 19:58:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f7211ef3511006c497a84691c01701fc SHA-1: e776db496aa6117db94606ed7e3cd97a0b9e1725 SHA-256: 0eb4fa394251fd36aaeba71b9014f3f537d316b280fc3a38bb0768580c26d346
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded JavaScript and multiple external links, some pointing to compromised or disposable domains, indicating a phishing or malware distribution attempt. The ClamAV detection and ML classifier further support its malicious nature. The presence of a download button lure reinforces the intent to trick the user into downloading a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9726

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://dade666.com/userfiles/202109file/2021091417223870554.pdf In PDF document text
    • https://bomnuocebara.com/quangbasanpham/app/webroot/upload/image/files/64049011962.pdfIn PDF document text
    • http://alemotta.com/resources/original/file/80756293366.pdfIn PDF document text
    • https://spirit-legend-enterprises.com/webroot/editor-uploads/files/81170592834.pdfIn PDF document text
    • http://bioident.pl/photos_fck/file/75239386896.pdfIn PDF document text
    • http://www.logistiekverbeteren.nl/ckfinder/userfiles/files/27056608645.pdfIn PDF document text
    • https://upbfassadenbau.com/upload/file/fesugi.pdfIn PDF document text
    • http://leguido.net/files/53576091588.pdfIn PDF document text
    • http://rklatex.com/userfiles/file/55719380134.pdfIn PDF document text
    • https://jaunimodienos.lt/wp-content/plugins/super-forms/uploads/php/files/oongmliadhiamiv9rjdfvnqooj/sabafonudosafog.pdfIn PDF document text
    • http://myblindz.com/fck_user_files/file/83453017123.pdfIn PDF document text
    • https://producedepot.us/userfiles/files/2573055553.pdfIn PDF document text
    • https://samsungklimalar.com/upload/ckfinder/files/wiselano.pdfIn PDF document text
    • http://ch-bovi.com/upload/files/41376693183.pdfIn PDF document text
    • https://ienter.bg/files/21274185713.pdfIn PDF document text
    • http://controlsystemco.com/cache/fck_files/file/17393395286.pdfIn PDF document text
    • https://stellabakingcompany.com/wp-content/plugins/formcraft/file-upload/server/content/files/16134020819f95---repurumipel.pdfIn PDF document text
    • http://www.fred-robin.com/ckfinder/userfiles/files/54396543804.pdfIn PDF document text
    • http://www.libroparlatolions.it/backoffice/ckfinder/userfiles/files/79317291870.pdfIn PDF document text
    • http://agama-rc.com/upload/files/16664274802.pdfIn PDF document text
    • http://muzycznescyzoryki.pl/userfiles/file/kababadakamiligubexexon.pdfIn PDF document text
    • https://iphastkala.com/userfiles/file/zatodezibudekadomevuwo.pdfIn PDF document text
    • http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/16139f7d274c49---zadepimimidezeto.pdfIn PDF document text
    • http://hoangnamjsc.com/upload/files/96081668547.pdfIn PDF document text
    • http://garageanything.com/js/upload/files/tuxedugewob.pdfIn PDF document text
    • https://ikorti-iao.com/userfiles/files/rojoxiku.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=arabic+dua+for+good+healthPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ecfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECFE 23724 bytes
SHA-256: 54ab70b0595d8549ea806220dfd24754b3fb7d695f433600868699abf8255880
font_01_sfnt_off00012918.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12918 1840 bytes
SHA-256: e11639021ae82bc81d66597892112dbefd7f2cb67f426bbebb6fc3c29591e729
font_02_sfnt_off000131bf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131BF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000149d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x149D6 10704 bytes
SHA-256: 054866e68af66bc1d18b03d9332e25c593164b4dac07ffe597fcdb868c24f368