Malicious PDF — malware analysis report

Static analysis result for SHA-256 03eab3156e43a2af…

MALICIOUS

PDF

91.5 KB Created: 2021-07-02 03:28:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 204bce3f650aa076fe341c4fbb8e3710 SHA-1: 4d2ad69f9a5441c56030ec94a671a9433cbb550c SHA-256: 03eab3156e43a2af5735e79e7c18ed98d2b34cb6ad415363a91c20e9bee6e9de
156 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains a link farm pointing to numerous compromised WordPress sites and disposable hosting, suggesting an attempt to distribute malicious content or manipulate search engine results. The presence of multiple external URIs and the overall structure indicate a phishing or spamming campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://lambanghieuquangcaogiare.net/vietkiendo/upload/file/pazafufojewukuboremim.pdf
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbd6087bdd---12879025971.pdf
    • https://abhimaninteriors.com/ckfinder/userfiles/files/82791574580.pdf
    • https://wholisticvibrations.com/wp-content/plugins/super-forms/uploads/php/files/4b85acaeff118bb88d279851227b93c1/4825125305.pdf
    • https://actioncoach.com.my/wp-content/plugins/formcraft/file-upload/server/content/files/160aaac8d4d9d9---43812472119.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160886ce364748---nokofuwut.pdf
    • http://pileshoppen.dk/userfiles/file/vixilo.pdf
    • https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/3qjihal6lrlvfbhm58omv1m151/12225803650.pdf
    • http://ibb-online.ru/f/file/25708386270.pdf
    • http://elite-nails.pl/Upload/file/26980174024.pdf
    • http://angelcabrera.com/FCKfiles/file/66143819387.pdf
    • http://foodsafebox.com/ckfinder/userfiles/files/nifajewumodonudidawosate.pdf
    • https://www.espymetcalf.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607eb1618b374---risodo.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fd619c30e0---48039786492.pdf
    • https://www.officinadelgustoroma.com/wp-content/plugins/super-forms/uploads/php/files/dd220cd9c4fee438328aacf62b80ad29/93388209363.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609cff5098d5f---resubosizi.pdf
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/73f36f61dc1f3ad5c4219f7365792ab2/wowukurelamoli.pdf
    • http://tz5168.com/uploadfile/image/2021/06/09/file/20210609_003514_188.pdf
    • http://libron.pl/fckupload/assets/file/junomivoxibibasijorefugaw.pdf
    • https://bhsbeacon.com/FCKeditor/file/geneginugi.pdf
    • http://www.tekkoo.net/images/library/File/30248005546.pdf
    • http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bbe31ba335c---46596758738.pdf
    • http://tsg-vaganovskoe.ru/ckfinder/userfiles/files/35683466544.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/S30rS-6n6vg/uplcv?utm_term=a+second+chance+movie+2014
    • 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_off0000ff9e.bin
99aa890eb272c80e84b82d3c8d177d208011f93fc7891419a50d91bba14da907
pdf-font-stream PDF embedded font (sfnt) at offset 0xFF9E 10812 bytes
font_01_sfnt_off0001187e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x1187E 16792 bytes
font_02_sfnt_off00013090.bin
dcfd38a5152eb58556f880ce44955bc012c933caf95129fa7fcd8b4e9121f131
pdf-font-stream PDF embedded font (sfnt) at offset 0x13090 18116 bytes