Malicious PDF — malware analysis report

Static analysis result for SHA-256 30cfa15096ec2f1b…

MALICIOUS

PDF

83.0 KB Created: 2021-09-06 15:38:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 990a66d0dd29cb62206906d77f8d3c83 SHA-1: 9618e2ae99c37e95c1552cf31d2f618dea02f578 SHA-256: 30cfa15096ec2f1bc0bc218eae67b36686d4b56d5d22e9bfcc1d0ce1a273e201
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 for 'Pdf.Phishing.Trojan'. It contains numerous links to compromised WordPress sites and other disposable hosting, indicating a link farm designed to redirect users. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/582a4cc79e9ae688d091fb5f37031e21/82007010482.pdf
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b15472226f2---31927270471.pdf
    • https://espritgt.com/userfiles/file/22184409232.pdf
    • http://jjmcp.jp/userfiles/Image/file/zedorenalemirora.pdf
    • http://gfzgt.ch/upload/file/newimapimemovigufopowus.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/86653176168.pdf
    • http://phayaotechno.com/UserFiles/File/45883517211.pdf
    • http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610c26484cd78---firog.pdf
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acf9135c03f---15156113301.pdf
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/nrql8gfpqcmr05k2esm3h5b6e5/28120624153.pdf
    • https://asoriofrio.org/ckfinder/userfiles/files/jugagado.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/795d846ccc4a999366296715f85b5963/doxitolorev.pdf
    • https://accuratesearch.com/userfiles/file/62073286120.pdf
    • https://ajwatravel.com/wheelmarine/userfiles/file/49038357727.pdf
    • http://judyzscotties.com/clients/1/1f/1f1ef5c9f72ce0e5bea5babf356718c6/File/kelifaxujokegefifaveden.pdf
    • http://www.maoles.com/wp-content/plugins/formcraft/file-upload/server/content/files/16126fb9839bf6---81168457969.pdf
    • https://livstyle.ro/home/livstyle/public_html/uploads/files/lirat.pdf
    • http://kennyre.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c69466cbed7---jakolefasozef.pdf
    • http://www.patricktennis.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1609e3fed8dbaf---66320735800.pdf
    • http://stolizstekla.ru/userfiles/file/50560252434.pdf
    • https://bodymason.com/user_uploads/files/zosotiteza.pdf
    • http://sahamit.net/userfiles/file/tizuxezapavegobibutanuta.pdf
    • https://thewaves.net/wp-content/plugins/super-forms/uploads/php/files/qshuk5mv033hngshpp835uk1ec/gitorer.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=chimney+sweeper+songs+of+experience+pdf
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/27df45bac6a11a58f5c3bf02a5c3f527/73334708493.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_off0000de9a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9A 16792 bytes
font_01_sfnt_off0000f6ac.bin
19f3f8dad989e595cfe95e84d1e6dae0d0daec883a4cfcb05ef099188bee0f47
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6AC 17628 bytes
font_02_sfnt_off0001248f.bin
d7d1b558dd8e65d8c3b550bb1d1aa650b24e3186ef47526c404a77f8dd26dc85
pdf-font-stream PDF embedded font (sfnt) at offset 0x1248F 11092 bytes