Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c094d61b04d1004…

MALICIOUS

PDF

69.0 KB Created: 2021-10-01 11:32:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dcf1ae9d5126e51dc5b4dde5b6af3ef4 SHA-1: 2c77c9c7ee95e4f356f6523e28133ec1b6b64c29 SHA-256: 8c094d61b04d1004a9170a9ee79da0ec48aee829ce985ca8ce8ce33c8011ad6a
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

This PDF document is identified as malicious by ML classifiers and ClamAV, exhibiting characteristics of a phishing lure. It contains a screenshot disguised as content, with embedded links pointing to compromised WordPress upload directories and other potentially malicious sites. The document's structure and the presence of numerous external links suggest an attempt to redirect users to a malicious payload or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 2 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132ae9cce30d---29876473610.pdf
    • http://bridgesonthepark.com/wp-content/plugins/formcraft/file-upload/server/content/files/16133188583c3a---86476760449.pdf
    • http://getawaynewzealand.co.nz/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed5a2bed7a---43711309267.pdf
    • http://www.alliance-bio.com/user_data/editor/ckfinder/core/connector/php/upload/files/86045980039.pdf
    • http://sofia-es.tokyo/yamituki-n/uploads/files/39552014967.pdf
    • https://dichocungtoi.com/userfiles/file/sefowugokekogurareza.pdf
    • http://ohadalegistrocbarter.com/ckeditor/uploads/files/27085523240.pdf
    • http://retailjewellerindiaawards.com/userfiles/file/38947818436.pdf
    • http://esistore.lu/userfiles/file/paperizi.pdf
    • http://dpholding.ru/uploads/files/98440770728.pdf
    • https://mercedesmazo.es/wp-content/plugins/formcraft/file-upload/server/content/files/1614046295ced9---wugonexalumoloxivego.pdf
    • http://ver9ctrl.sonikgps.com/ckfinder/userfiles/files/35499765567.pdf
    • https://gea99.com/ckfinder/userfiles/files/lowuposo.pdf
    • http://nessium.fr/userfiles/file/roderunigelipoxibopufuve.pdf
    • http://commsoft.nu/demo/ktb/wsmbilder/files/47606149557.pdf
    • http://tianfonmm.com/d/files/kalodugizavit.pdf
    • https://oykufestivali.com/ckfinder/userfiles/files/demipetubilifimumiduw.pdf
    • http://iraneto.com/basefile/iranetocom/files/4538752209.pdf
    • http://ruben.pl/ckfinder/userfiles/files/digirafag.pdf
    • http://oldmotorsclub.com/files/file/ponesipojokawadano.pdf
    • https://thegioidongphuc.net/ckfinder/userfiles/files/80760340717.pdf
    • http://alnoorcity.com/userfiles/file/2930482361.pdf
    • https://madame-tina.com/ckfinder/userfiles/files/vubap.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=vocabulary+start+with+s
    • 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_off0000b23c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xB23C 16792 bytes
font_01_sfnt_off0000ca53.bin
3be7341c77181c8e63f3f8f4cdc517b88f8fbc44c77ab91050ce874eb56f2246
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA53 10500 bytes
font_02_sfnt_off0000e26f.bin
61cbc672057621895ca02a9271b38ec57f6b3edca141c5966daa9679d9cddcf4
pdf-font-stream PDF embedded font (sfnt) at offset 0xE26F 14464 bytes