Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dba3758962f196c…

MALICIOUS

PDF

83.2 KB Created: 2021-08-26 05:53:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7ff69894634511f901563ded2d8fc8bd SHA-1: c9b717ebca3b39e59cf51a5e927ed530c585fa63 SHA-256: 2dba3758962f196c41a22430200fd12863e12af6d99ad26a2ccbc9f5ed045396
164 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by a machine learning classifier and ClamAV. It contains numerous links to compromised websites and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of a 'download button' lure further supports the phishing and malware distribution intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://crysiq.ru/uplcv?utm_term=real+video+star+apk+download+android
    • https://contabil-fiscal.ro/mm/file/41171728286.pdf
    • https://www.displaysdirectaustralia.com.au/application/third_party/ckfinder/userfiles/files/tabezofetiposarofofo.pdf
    • http://www.ettermanenterprises.com/ckfinder/userfiles/files/damobosidolidemedebinos.pdf
    • http://inphilong.com/upload/files/81746860087.pdf
    • http://thanuyentea.com/ckfinder/userfiles/files/vitebeva.pdf
    • http://akademibt.com/resimler/files/lanune.pdf
    • https://study-go.info/wp-content/plugins/super-forms/uploads/php/files/159977c475ed112c6396ac9860a179c8/78693996528.pdf
    • https://cananalimdar.com/wp-content/plugins/super-forms/uploads/php/files/7csnb75mva98o2mhpu3f1u5tvt/tepukatoxidutif.pdf
    • https://canionglobal.com/FCKeditor/file/96196312772.pdf
    • http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1607c1c60e09f7---88481128641.pdf
    • https://baohohoanglong.com/userfiles/file/danodefisogawe.pdf
    • http://www.mtpartnersfl.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ccb498fd47---nidoxoxulisekulevimesas.pdf
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/3299199fbeccdc114861fe0bdf911784/84077867696.pdf
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ee27633f26e---38875784610.pdf
    • http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acae981844d---21655492762.pdf
    • http://hanboo.cn/Uploads/file/2021052805070370554.pdf
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0096147c---51979064510.pdf
    • http://prakseologia.eu/userfiles/file/30189425769.pdf
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609843396b10e---gokokaliw.pdf
    • https://gpagroup.in/wp-content/plugins/formcraft/file-upload/server/content/files/16126bbd2d3086---71642454246.pdf
    • http://evo-models.com/uploads/userfiles/files/83937341134.pdf
    • http://orourkelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lenabuvuforu.pdf
    • https://www.digitalsofts.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a8c806ad73b---16711358969.pdf
    • 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_off0000e262.bin
15c4aaeb8b4222ad1e82650f882f8092eb5d382869bb029b9fce419152de4ebf
pdf-font-stream PDF embedded font (sfnt) at offset 0xE262 16696 bytes
font_01_sfnt_off00010dc3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC3 16792 bytes
font_02_sfnt_off000125da.bin
f7c1f116c4c2afdb80ec5477a7221d267b07720bf9f9d4db2cc27b2dc6069b0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x125DA 10672 bytes