Malicious PDF — malware analysis report

Static analysis result for SHA-256 6072116e9d196530…

MALICIOUS

PDF

73.3 KB Created: 2021-09-20 05:20:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: d1b9883b2d34610f4aede5ea59910f39 SHA-1: 2e9e3ed3ef4dc5a16abeb7645e9d52da61bab08b SHA-256: 6072116e9d1965309fa2c93b94626e831ab5246a699d179803a7cfc1f9609c45
172 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as a phishing trojan and by an ML classifier, indicating malicious intent. It contains an embedded JavaScript stream and a link farm pointing to multiple compromised websites and disposable domains, suggesting it's designed to redirect users to malicious content or download further payloads. The presence of urgency lures further supports a phishing or social engineering attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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
  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://shinies.ru/img/lib/file/todenuso.pdf In PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/33444723676.pdfIn PDF document text
    • https://tennis94.fr/img/pics/files/rolekebumotekufate.pdfIn PDF document text
    • http://epoptavky.com/is/images/FCKeditor/File/tepubopogel.pdfIn PDF document text
    • http://www.ponderosafestival.com/wp-content/plugins/formcraft/file-upload/server/content/files/16142c1c7c2099---65839899005.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/74965725227.pdfIn PDF document text
    • http://exdebt.bg/userfiles/file/23076152943.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-9-19/20210919104802966486.pdfIn PDF document text
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b4f252dff6---savatip.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/38751167929.pdfIn PDF document text
    • https://atlastoursntravels.com/userfiles/file/julomane.pdfIn PDF document text
    • https://simorgh.it/uploads/file/wagas.pdfIn PDF document text
    • http://conflictfreeelectronics.com/ourprojects/chowki/UserFiles/renuka/file/59443453596.pdfIn PDF document text
    • https://irisapp.cn/uploadfiles/fckeditor/20210917/file/16318383494076.pdfIn PDF document text
    • http://sistersaviopublicschool.com/userfiles/file/92190635426.pdfIn PDF document text
    • http://creatinglifeoptions.com/userfiles/files/fuwunosuje.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/0ee748636f882d88d87c23fa4937e8a0/jotujule.pdfIn PDF document text
    • https://leciv.fr/uploads/FCK_files/file/55772444451.pdfIn PDF document text
    • http://globalroomplus.com/bot/ckfinder/uf/files/70894482770.pdfIn PDF document text
    • https://encouragingmath.com/wp-content/plugins/super-forms/uploads/php/files/e1236ad0150c265dc9a70d01202278d6/41783586635.pdfIn PDF document text
    • http://pune-india.info/userfiles/file/sabovonoguxununugarad.pdfIn PDF document text
    • https://corumosmanlimakina.com/js/ckfinder/userfiles/files/zeborurosu.pdfIn PDF document text
    • http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1614053e827520---jimabupufovereji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=great+grand+masti+123moviesPDF 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_off0000bc5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBC5D 16336 bytes
SHA-256: 2df4523bebb2a5a9e75385110b695f1342a7db4958c564bb115ceb1702e0af69
font_01_sfnt_off0000e673.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE673 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fe8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE8A 10996 bytes
SHA-256: d9c9985369cdc045744be0115e98433c18d2917d23c82e152c55f0530223dff3

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