Malicious PDF — malware analysis report

Static analysis result for SHA-256 44b332abd62abe09…

MALICIOUS

PDF

84.8 KB Created: 2021-08-22 00:55:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0e39ae3b25a29191e4b3785c153d9cfd SHA-1: 7c1999456f1dcbc4b3a63b44d28c5c8fccd14b14 SHA-256: 44b332abd62abe09d64805c6494dce06a38da00ef8223ae8f3043ff527046167
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript, which is a common technique for delivering malicious content. The heuristics indicate that the PDF links to a farm of compromised WordPress upload storage and disposable hosting sites, suggesting an attempt to redirect users to malicious content. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9905

Heuristics 7

  • 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.
  • 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 https://dhins.com/testingsites/advantage_aviation/assets/media/file/415005204.pdf
    • https://aadhaarretail.com/administrator/imagetemp/file/ziwixupof.pdf
    • http://somsit.com/ckfinder/userfiles/files/41984947463.pdf
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/bebukub.pdf
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/33edcl2ek5vchk8sba4ukvc651/72468372310.pdf
    • https://tabularasa.lv/sites/tabularasa/uploads/documents/files/vosexuzemebixutefox.pdf
    • http://jagodkaprzedszkole.pl/userfiles/file/vudexopukuj.pdf
    • https://www.hotelamoha.it/wp-content/plugins/formcraft/file-upload/server/content/files/1609df6b885701---75436065242.pdf
    • https://wodepcb.cn/uploadfiles/files/toloxigob.pdf
    • http://melhi68.com/clients/69549/File/fonofugorexawimelujoki.pdf
    • http://www.palmettoexpresslanes.com/system/js/back/ckfinder/userfiles/files/89061194614.pdf
    • https://wecareprogram.org/images/file/33765023787.pdf
    • http://avandcie-automation.fr/ckfinder/userfiles/files/10538113195.pdf
    • https://afra24.com/basefile/afra24/files/28539210968.pdf
    • https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/b915e5defb88dfce74205f2260dbfed1/65824827254.pdf
    • https://2ruoteexpo.it/ckfinder/userfiles/files/46334633852.pdf
    • https://novahealthclinic.ca/userfiles/file/pofenomovaxabekuvabolurum.pdf
    • http://scro.ru/pic/file/77803005515.pdf
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f263a020a49---jexolodi.pdf
    • http://www.neoneofitou.com/ckfinder/userfiles/files/36405021408.pdf
    • https://www.mercedesbenzofaustinservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c2f3655820---fesifivuxiwogatiwade.pdf
    • http://iphonedown.com/ckfinder/userfiles/files/68566970726.pdf
    • http://terapeutickemasaze.eu/wp-content/plugins/formcraft/file-upload/server/content/files/16080598a58690---6125931150.pdf
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b64407b984c---4568638502.pdf
    • http://www.veronicaneal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/1607c2ec2d9253---21497535477.pdf
    • http://fanta-life.com/userfiles/file/27267808202.pdf
    • http://gialtour.it/themes/userfiles//files/35557220543.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=public+speaking+course+mean
    • 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_off0000e859.bin
0e6f9cd7397bef06e10b912f0fac93e84c8f4aa15ffce06f9456569d54c02d8f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE859 10952 bytes
font_01_sfnt_off00010181.bin
59173f8b9266a36bf9bd86538d275c6f1a86b4a39dab80f6811c8ea0a4cdcd86
pdf-font-stream PDF embedded font (sfnt) at offset 0x10181 16904 bytes
font_02_sfnt_off00012d70.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D70 16792 bytes