Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ffc357abf9e0fbf…

MALICIOUS

PDF

253.0 KB Created: 2021-06-27 21:55:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 02b0a83c076a96b6bb3965f6d4f8f7d1 SHA-1: accda7e4af11df7899f18068d317b12cdee49a8d SHA-256: 6ffc357abf9e0fbfdd6e422d36d78e7beae7c4d6647961904f5ce343666662fd
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution attempt. It contains multiple links to external websites, some of which point to compromised WordPress upload directories, suggesting a tactic to host malicious content. The presence of embedded URLs and the nature of the heuristics strongly suggest the file is designed to redirect users to malicious sites, likely for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7938

Heuristics 5

  • 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.
  • 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://smidgel.ru/uplcv?utm_term=meaning+of+time+keeping
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608b412216f80---rokenenubifinalirivefu.pdf
    • https://dangeloremodeling.com/nbloom/fckuploads/file/44852977575.pdf
    • https://carlojans.com/cms/file/74667485060.pdf
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c89afe8bb8a---88057146492.pdf
    • http://www.findvoters.com/userfiles/file/kuwurap.pdf
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/2suk0lfoireft1rgmr66bqs39i/76645703142.pdf
    • http://apexibd.com/uploads/fck_uploads/file/fagakusetotile.pdf
    • https://watfordfairtrade.org/app/webroot/img/files/mefisepexob.pdf
    • http://catgarner.com/clients/873270/File/dokizarisef.pdf
    • http://haithuanphat.com/uploads/files/vefawetidokasele.pdf
    • https://eseninternational.com/uploads/files/73599246070.pdf
    • https://k9-warrior.com/wp-content/plugins/super-forms/uploads/php/files/5decg89tr2oki8vo3oiold6shc/94374092509.pdf
    • http://thm-holding.ru/wp-content/plugins/super-forms/uploads/php/files/c04924cb18a2ba96363b6b3bd969dc7e/33545950171.pdf
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608288c0ac955---zimoluzetedobawimibufuvo.pdf
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/a8e4cd9f704f16dbc5f2e10aa2f05ee0/kajolilonugaforab.pdf
    • https://daulte.ch/ckfinder/userfiles/files/vawowap.pdf
    • http://nc2e.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1608338ef6a5a1---vuxuvojojefoxag.pdf
    • https://spheresignal.com/app/webroot/userfiles/files/taripisesididiru.pdf
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/26ed68f22f2de9df6314adeb96c7a703/ralukebisowutif.pdf
    • http://asesoriagarpe.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc64fe11f6b---lejavomegisala.pdf
    • https://balajitutorial.com/admin/userfiles/file/40134066325.pdf
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/62b50125595aaa69d33b4cc0c35b8aab/91089311526.pdf
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606cb290a2048---85364645599.pdf
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/muqe05jgcdamsf4pu2o1hc8tm2/rezuwiwadevujezefumin.pdf
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/6860f807775091123879b1857eebd192/94772029599.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00031ebe.bin
2fe3ad71a30c8ef949fb38bcaef939d48dbc3cb869e7053bdbae72d6e3ac1cb2
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x31EBE 39228 bytes
font_00_sfnt_off0002afb7.bin
e88a874c436f1dd990a3e7f7a3769166ca796c236955fc956e98339505150af2
pdf-font-stream PDF embedded font (sfnt) at offset 0x2AFB7 10472 bytes
font_01_sfnt_off0002c77c.bin
300c432556ddac0aeddf8828982597406619627341150ff3729e733db2c3183a
pdf-font-stream PDF embedded font (sfnt) at offset 0x2C77C 42076 bytes
font_03_sfnt_off00036629.bin
f627e28d555d3d2e040809ef863e9128746fe14538ada080b4118f8242768d66
pdf-font-stream PDF embedded font (sfnt) at offset 0x36629 36972 bytes
font_04_sfnt_off0003cbdb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x3CBDB 16792 bytes