Malicious PDF — malware analysis report

Static analysis result for SHA-256 0358ae012d95e401…

MALICIOUS

PDF

147.4 KB Created: 2021-06-29 05:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 7817df18393993ebf36cfe73d67daf6b SHA-1: 25526a8d3beab0059fd37f45c343cf78179f65d0 SHA-256: 0358ae012d95e401c5949874813a9b67b93e18f3b1e39c4468bfe689a627c126
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded URLs, many of which point to compromised WordPress sites and disposable domains, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9714

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://xn--i1aam8cb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/78317aa354550c12c76e16a26ff90a81/xatuvoximerugijupuki.pdf
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aea2a8bfe45---70166123956.pdf
    • https://aartipalette.com/userfiles/file/95800124965.pdf
    • https://xn--80adj7cxa.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6906dc12e14201d1630e7bb2fae39ac9/56739763419.pdf
    • http://greenlivinggarden.com/htdocs/UserFiles/file/woligipaxurefuposoletob.pdf
    • http://commandhousecreations.com/uploads/files/xatusetibataduzibagem.pdf
    • http://bugaboo-buffalo.eu/UserFiles/File/fivefigudizagez.pdf
    • https://nationalcardsolutions.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb1df0aaf2---6646060047.pdf
    • https://almoheetmanpower.com/public_html/userfiles/file/13928576802.pdf
    • https://cutletsmeat.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075b745b6781---74005817242.pdf
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/413386ae1a88ba030f135d1335960b9a/ganimopevopakuloveponese.pdf
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/be0fa277d923314015cd4383c8881254/wowureruvoxinexatasimiw.pdf
    • http://cdseoulps.com/uploadfile/fckeditor/file/fumijinukatulirur.pdf
    • http://for-rent-antwerp.com/wp-content/plugins/formcraft/file-upload/server/content/files/16098974644388---7994502013.pdf
    • http://workcoop.org/fckeditor/userimages/file/20210629110908.pdf
    • http://www.x454.com/wp-content/plugins/super-forms/uploads/php/files/rbki53hvjtd5c882epci69ecb4/vedufefadesekivowelen.pdf
    • http://www.misshandicap.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16082f22400067---jobedokamimuget.pdf
    • http://kiiga.ru/userfiles/file/88785197471.pdf
    • http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608f612f2575e---32948929821.pdf
    • http://tortsurprise.ru/upload/redactor/files/18142434989.pdf
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160946d11a91f4---funenixatuvebozarenekebis.pdf
    • http://sanitaerprofi.ch/fckeditor/editor/images/file/17816857160.pdf
    • http://ashioke.com/images/library/File/netojalotibamokutukupir.pdf
    • https://chamsocmuihong.com/wp-content/plugins/super-forms/uploads/php/files/459d86rfjqakdf704114m28237/28519843974.pdf
    • https://alfa-pechati.ru/wp-content/plugins/super-forms/uploads/php/files/89fea4310e8eef830c8e340bd4204908/barabemamotux.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=tend+meaning+in+arabic
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00019ecc.bin
9f90349c87b7911df5af597f82913bc57a6f1dcb7161dc26cdd6938314663798		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x19ECC 32936 bytes
font_01_sfnt_off0001dcd6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DCD6 16792 bytes
font_02_sfnt_off0001f4e8.bin
11180435b0076e5b23c64a2e2f2458af5fb23eced1f92b9bbbf009a75926e38b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1F4E8 20408 bytes
font_03_sfnt_off000228af.bin
9f62d624668e26444c74d8f917f67df388f52508a13d0153f5d0a3f57d0d44d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x228AF 10384 bytes

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