Malicious PDF — malware analysis report

Static analysis result for SHA-256 cacc1ff7c452e5a9…

MALICIOUS

PDF

86.6 KB Created: 2021-06-26 03:26:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 90f1a6e5bdb3c9ef934c54132609d4b2 SHA-1: a04403453b119e3c1bc28f15eab64c38660eadaa SHA-256: cacc1ff7c452e5a92382f2aadc6ae647628413f2dd909c7724ddafc263968384
156 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to websites that appear to be compromised CMS upload directories, suggesting a phishing or redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious content or download further payloads. No scripts were extracted, but the structure and URL patterns are indicative of a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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 http://www.meglobalinc.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160767d7f3cfcb---47613869480.pdf
    • http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c5905ee11d---83804702894.pdf
    • https://sancarspune.com/wp-content/plugins/super-forms/uploads/php/files/0edd0f27443ac85eef06aaf79770c602/17142659606.pdf
    • http://www.next-conseil.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1609a214a04dcd---30922925754.pdf
    • https://canionglobal.com/FCKeditor/file/vorikaxugibu.pdf
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/160927e0019026---tokonesolik.pdf
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/1a46ff63782135cd55156e5db100446b/59282785228.pdf
    • https://readxyz.com/wp-content/plugins/super-forms/uploads/php/files/177639b80ae2c138149799c886e3c3f6/16536306033.pdf
    • https://tarzminder.com/resimler/files/wozobibokepasabetinona.pdf
    • https://www.carrentchiengmai.com/files/80647023004.pdf
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/iei5n9fudvh2h9kh5f066b7n72/98316117772.pdf
    • http://studiopol.com/userfiles/files/7155476085.pdf
    • https://lashmakerpro.it/wp-content/plugins/super-forms/uploads/php/files/k7q80iishv3askos5tt9815tt6/79315175545.pdf
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c9442a19e7---7969203448.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/316fd3c8a923286bdb1948c8c2c55ea6/jigakimolijogo.pdf
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b0b6d52051a---51653704043.pdf
    • http://www.empresasdelimpeza.info/wp-content/plugins/formcraft/file-upload/server/content/files/160786bfdddce1---18489780151.pdf
    • https://gauravkankariya.com/wp-content/plugins/super-forms/uploads/php/files/ejo70vrch4vonsteorfi479175/99845343452.pdf
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/92055eee88a5bfb2f39b024307e351e8/wovuwipowevise.pdf
    • http://reszke.pl/fckeditor/editor/filemanager/connectors/php/file/50408149302.pdf
    • http://vibrosystem.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a6afc60c9c0---31012426297.pdf
    • https://binhruamuinanobac.com/wp-content/plugins/super-forms/uploads/php/files/mt8t1cj7j8b70paes17ndsk26j/61662505031.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=shell+grotto+margate
    • 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_off0000efb3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xEFB3 16792 bytes
font_01_sfnt_off000107c5.bin
db9ae7433d324b9dfd609dbf83ec48684216b594794c9c7f3c139ed907825b39
pdf-font-stream PDF embedded font (sfnt) at offset 0x107C5 17692 bytes
font_02_sfnt_off00013623.bin
f2ecc0b9962daf775b72b5d1e2c929309171e5c3393653a3131393ac5a68cbb8
pdf-font-stream PDF embedded font (sfnt) at offset 0x13623 10268 bytes