Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecc64dbc7eddc6cb…

MALICIOUS

PDF

87.7 KB Created: 2021-06-28 08:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a5dd21153bc487b436e0592e8b4b4cc7 SHA-1: cdd66468c1acd882a8efd353479bf4108c14854c SHA-256: ecc64dbc7eddc6cbcc347fd3d638b71e4d90b1e4a83a2177867e1ecea7f63789
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to direct users to phishing or malware-hosting sites. The primary attack pattern observed is the use of a link farm within a PDF document to distribute malicious URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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 https://dtcprojects.com.au/wp-content/plugins/super-forms/uploads/php/files/60ehgs0ijrphjh05846b3490gl/senigoxe.pdf
    • http://vasilii-orlov.fun/wp-content/plugins/super-forms/uploads/php/files/c5c4176cdd5de95a474c23f41841db56/manisuzadonutuposo.pdf
    • https://landbondcorten.com/attachment/file/4538cb3233f64e72363db9374994ec27.pdf
    • http://mgocsm.in/userfiles/file/nasagawanuguzesefo.pdf
    • http://111-orte.de/testarea/cwsCMSlight/media/files/kexapaxora.pdf
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a86bb6c0ae5---jafawizipofebi.pdf
    • http://metallpress.info/files/28000725865.pdf
    • http://shadesvalleymounties1969.com/clients/868959/File/zijidifobed.pdf
    • http://giftboxvietthuy.com/upload/ck/files/33941886475.pdf
    • http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160910436d2204---kotanedup.pdf
    • http://www.investing-in-women.com/wp-content/plugins/formcraft/file-upload/server/content/files/160908e155adfd---zukolizoboxezoki.pdf
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd18b08d40---zakijejefuzodi.pdf
    • http://boulderdivorcelaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079f1ec8d1e1---xiriwifogi.pdf
    • http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/dd2749e4275c939f368edb17d68c51c8/redikivedituj.pdf
    • http://begemot-rus.com/uploadfiles/file/2021050411150473499.pdf
    • http://www.neslihanonur.com/wp-content/plugins/super-forms/uploads/php/files/e2b0ef1ac454756428c620fd99bdf5c4/80644398896.pdf
    • https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a28288a0fb2---74180862818.pdf
    • https://foundryindia.org/userfiles/file/nepireropulal.pdf
    • http://yuha.be/_files/file/tizikuleranobuwizugiv.pdf
    • https://attack.lt/images/files/73180837193.pdf
    • https://bkht.vn/userfiles/file/zikefa.pdf
    • http://worthingtonpark101.com/userimages/51850754645.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=sequence+of+jesse+stone+movies
    • 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_off0000f2b8.bin
02597ebe4de5825f85bf0d01018373f3b8c49c6f05633f12a58e454404775152
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 17636 bytes
font_01_sfnt_off000120f4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x120F4 16792 bytes
font_02_sfnt_off0001390b.bin
a976cf02db44a342d835f9ac1b39c2d2ea3bdbe0d9e7fb79f8ba9a3115aa05af
pdf-font-stream PDF embedded font (sfnt) at offset 0x1390B 10708 bytes