Malicious PDF — malware analysis report

Static analysis result for SHA-256 48973a25cd005de5…

MALICIOUS

PDF

96.9 KB Created: 2021-09-03 01:50:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 569c6ea614eb8e28c902eb7adf71ec59 SHA-1: 6b092c8303c6185cc7d1a6b4c5b47f3804dac32f SHA-256: 48973a25cd005de55a724a13d94ff684a51b9c6d9aa6a3e02112ad5bf04574c3
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, suggesting a phishing or malware distribution scheme. The presence of embedded JavaScript indicates an attempt to execute code, likely to facilitate redirection or payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9965

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • 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.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/161061ba93c7e7---95922145326.pdf In PDF document text
    • http://lyshiying.com/d/files/donova.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b1c4f77bdc---xexixogakatutanu.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/31275376227768d271c94383bd0c31fa/77869552692.pdfIn PDF document text
    • http://emiem.pl/public/upload/ckfinder/userfiles/files/5573179271.pdfIn PDF document text
    • http://franklcalabreseattorney.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/kerukalokawamikuv.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/043b78da9c701b769ef50d7c4b78e8c9/42908169282.pdfIn PDF document text
    • http://rolmech-strzelno.pl/Upload/file/42751513307.pdfIn PDF document text
    • http://157.230.241.115/image/upload/File/96863452731.pdfPDF link annotation
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/f8a61c7f074488b5cd79c18896c24b36/51396332378.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/97978867146.pdfIn PDF document text
    • http://immobiliareborghi.com/userfiles/files/15517206520.pdfIn PDF document text
    • http://reiki-roots.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160c99ece99ca2---96718141828.pdfIn PDF document text
    • http://xn--rssx31a7tec6p.com/upload/userfiles/files/20210830091414.pdfIn PDF document text
    • https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a7755920dab---30844737296.pdfIn PDF document text
    • https://hoovermaids.com/wp-content/plugins/super-forms/uploads/php/files/4c4c4b9111dfa31907d32d60de1a8e25/sipegozumepizonozadix.pdfIn PDF document text
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/tfjnfkmrufnmkc7de9uj4t8femcjqld8/47648504474.pdfIn PDF document text
    • https://mariellatriolo.it/public/file/73064311148.pdfIn PDF document text
    • https://nepalaviationmuseum.com/userfiles/files/50599544032.pdfIn PDF document text
    • http://texmet.pl/userimages/file/25936691027.pdfIn PDF document text
    • https://empezo.xyz/js/ckfinder/userfiles/files/22002286702.pdfIn PDF document text
    • https://stvorki.ru/files/file/36137115275.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/jiwarubinid.pdfIn PDF document text
    • https://postscriptproductions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b246e207439---jisebabimifelixevivag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=bimanual+pelvic+exam+documentationPDF 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_off00011605.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11605 10728 bytes
SHA-256: 40becbb2283e17415b70b6811a24997fb0d6f30924256c627f1eddf82c2900f6
font_01_sfnt_off00012ea8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12EA8 18348 bytes
SHA-256: 3c78efc2284e6287fade9f41e6f5ba15e5b7fb6c2b81c7d01bc09aa0c4a0275c
font_02_sfnt_off00015d77.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15D77 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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