Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e113fccaa231934…

MALICIOUS

PDF

84.2 KB Created: 2021-06-25 18:05:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dbeaa21da9108b93fd353bbea1a45710 SHA-1: 22277e9e55cbeacf6962794049f49b6c51ef95f4 SHA-256: 8e113fccaa23193439fabd737bb67e67cd3f2b952fda7ee4a058c03e3a617a2e
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a link farm designed to redirect users to malicious content. The presence of these links and the overall detection profile indicate a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

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://dioceseofniranam.org/userfiles/file/65293439389.pdf
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/gl35hn81d3efp4d47h3bvt6th2/warew.pdf
    • https://www.alapan.org/fckimages/file/92691548002.pdf
    • http://www.oschouston.com/osc/wp-content/plugins/formcraft/file-upload/server/content/files/1609473424dba1---48110569118.pdf
    • https://lokmangal.co.in/wp-content/plugins/super-forms/uploads/php/files/0b7e3f282baf62431af4cbddf1e133e9/xenubepufe.pdf
    • https://ateneoarbonaida.com/wp-content/plugins/formcraft/file-upload/server/content/files/16091c2f268c0b---dekijasidosozavubududovep.pdf
    • https://roweryelectra.eu/app/webroot/uploads/file/16241372061371.pdf
    • https://ancoraeducacion.com/images/67800867019.pdf
    • http://kasargod.net/uploads/file/siwedekini.pdf
    • https://ltssinternational.com/res/wysiwyg/file/davuvowix.pdf
    • http://www.reroofingbrisbaneqld.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160bc186094b08---29757761030.pdf
    • http://pebyte.com/wp-content/plugins/super-forms/uploads/php/files/rbjckbra761gfamc0508fda4ii/fuvig.pdf
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/443e236a229d0f504d93c0d88f167f97/51766037486.pdf
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/d76a729bd08daf15dbf696a99bdac499/83703420229.pdf
    • http://ukicda.com/admin/fckeditor_upfiles/file/2021061904593080554.pdf
    • http://www.patriarca-batiment.com/ressource/site-image/files/65951350577.pdf
    • http://veronicanealhome.com/wp-content/plugins/formcraft/file-upload/server/content/files/2/160abd4bda01d2---rukovunexeso.pdf
    • http://fouladsazanco.com/Upload/file/wulotej.pdf
    • http://aurora-c.jp/files/files/55596449144.pdf
    • https://www.helpfulhunks.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160ab257e96f1c---soludofosawibugowomumej.pdf
    • http://amctop.com/board_data/editor_img/file/202106112301.pdf
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/k8qrukurtd2sm8bt9kndlvi5t4/mobawajumiwadufupurutopop.pdf
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c8e73251d1---gekutape.pdf
    • http://www.inhd.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16079d3bdba466---95917113601.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=supply+chain+management+overview
    • 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_off0000e74c.bin
d9a4a698416b1084fefe794c876d217d54c5302c6e7b381bd7463c18c863c3fa
pdf-font-stream PDF embedded font (sfnt) at offset 0xE74C 16380 bytes
font_01_sfnt_off000111bc.bin
f6ec41cf48ff76f979327d074c79bf3e3d49ea4b001d854e10758386b762dc24
pdf-font-stream PDF embedded font (sfnt) at offset 0x111BC 11096 bytes
font_02_sfnt_off00012b85.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12B85 16792 bytes