Malicious PDF — malware analysis report

Static analysis result for SHA-256 301ee8c8f56903e3…

MALICIOUS

PDF

133.4 KB Created: 2021-06-30 09:06:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 344d3d27e3b77201b7011440294923df SHA-1: e2e11bd9978577a5c9d3be24f18be9136f7cfa7c SHA-256: 301ee8c8f56903e32516288362ea9b91bfb2f25f95269085659048b65f71a24b
196 Risk Score

Malware Insights

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

The PDF was flagged by ML classifiers and ClamAV as malicious, with heuristics indicating it is a link farm and an advance-fee scam lure. The document body is heavily obfuscated and unreadable, but the heuristics strongly suggest a phishing attempt related to prizes or parcel delivery. Numerous URLs were extracted, many pointing to compromised WordPress sites or disposable hosting, indicating a distribution infrastructure for malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9491

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://askisan.com/upload/ckfinder/files/gozirivagitetenovazo.pdf
    • https://udachi.co.th/wp-content/plugins/super-forms/uploads/php/files/htoqc4e67d4pcitjvtsfh0f0ga/50373271028.pdf
    • http://stasta.com/userfiles/file/15370194029.pdf
    • http://aiswaryamatrimonials.com/fck_uploads/file/44738226432.pdf
    • http://ahxxzx.com/userfiles/202104/file/xotesurekabobepenad.pdf
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/3cf1n1oje72o0j50h2b5hltfur/benidokefawonenugiwet.pdf
    • https://xn--fct8ml6mwue.tw/uploads/files/vepoxakotol.pdf
    • https://sammycar.ch/sammy/sites/default/sammyfiles/newsletterfile/wawirimegivide.pdf
    • http://immopolignano.lu/images/xetipusu.pdf
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a477e7eb011---8862118442.pdf
    • http://kraljicabih.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a804f984008---53805656670.pdf
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16075ac6f18209---katixatuwavumevoxota.pdf
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cd2345403a---taxebetapetixopobubumu.pdf
    • https://www.fifatravels.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af8af0e39c0---44532772573.pdf
    • https://www.simcoerecovery.net/wp-content/plugins/super-forms/uploads/php/files/okkbv7l48d95bsl3guutiolm5c/46046582955.pdf
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608249a490e3b---topasevezetefizexurezagu.pdf
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/160748828aa994---28810075284.pdf
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160792c6c9866a---losatulad.pdf
    • https://ayurvedaemart.com/uploads/file/95144362884.pdf
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160d72e86d809b---senoxepitipemorukipij.pdf
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/8012cdcded495b5a90193ed1e2f0933b/fososirosutimamubizijuj.pdf
    • https://aedwea.com/upload/foto/33438557828.pdf
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/160d0092549fed---2952006831.pdf
    • http://zamokugrofa.sk/admin/fckeditor/file/37940211033.pdf
    • https://eagle-aviation.com/userfiles/files/mazavoxinisana.pdf
    • https://atx-stroy.ru/wp-content/plugins/super-forms/uploads/php/files/276382e1e801e636c3a656698e5e75fa/vebavapunilogasubi.pdf
    • http://beachhigh65.com/clients/879402/File/81045341738.pdf
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=currently+in+a+sentence
    • 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
font_00_sfnt_off00019fa0.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19FA0 16792 bytes
font_01_sfnt_off0001b7b7.bin
9c11bdacb69344719f9bc26a9dc5745719e99dd2fce24e8cb7a0a656498874d7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1B7B7 10348 bytes
font_02_sfnt_off0001cf37.bin
562d39cc93351683f3420870a5578826c1285db13c691c08f99be18f4980e560		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CF37 1860 bytes
font_03_sfnt_off0001d7e9.bin
33f4b6212c669d7c87b8beaaa4f1724ebeca15db1ca20b94e4ac3666570b98fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D7E9 17912 bytes

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