Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b036f0fc165681f…

MALICIOUS

PDF

90.0 KB Created: 2021-06-27 07:20:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 00d17423570637d7502964cf1bca6f42 SHA-1: 6546d712d0c5522a9a465dd0920c79800ee20590 SHA-256: 2b036f0fc165681f2af3fa1231c18ebd855871ca433c23a6a95cd1fe317a3d6a
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains a link farm pointing to numerous URLs, many hosted on compromised CMS upload directories, suggesting an attempt to distribute malicious content or phish for credentials. Although no scripts were explicitly extracted, the PDF structure and the presence of external links indicate a likely intent to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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://assushop.com/userfiles/assushop.com/file/67958855519.pdf
    • https://directorvincentchow.com/fck_filemanager_upload/file/votizetirisavedefun.pdf
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160befd8ec4407---batanisasu.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/rqedmi8o46pibeq7hr698ls1mb/8476693663.pdf
    • https://advancedcheckcashadvance.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609224dab573e---jitanaxopixaj.pdf
    • http://itaindustrial.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f917ad9bc4---44918502537.pdf
    • https://netiko.ge/img/Data/file/79064263338.pdf
    • https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/88aab7ff3b95630f1614ed260a8e6d80/mudifogetukal.pdf
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/2d247e8a37a3905bbf708b1a83c2807f/legedenilepesexet.pdf
    • https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/3ce87889223fd0bb62f77ba0a3f29539/wopumujeb.pdf
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a22531c5356---wejigasiditagid.pdf
    • http://livestreaming.group/wp-content/plugins/super-forms/uploads/php/files/bund55htvq9pd9gt0c9r4khovv0fjhun/71281248424.pdf
    • https://coebmsf.com/userfiles/file/xilizojesexijarorobu.pdf
    • https://fitnessrev.net/wp-content/plugins/super-forms/uploads/php/files/img8vq8u22tu68p2ij6s2fln2q/wegunoraxazevupotuk.pdf
    • https://www.napariverinn.com/wp-content/plugins/super-forms/uploads/php/files/028f33c3ca4680ba8dfa468e55d42fce/12384484128.pdf
    • https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/f90179a2a125a85e43eb78271140204f/guvufalijaxezusujavesod.pdf
    • https://aduanaldelvalle.com/userfiles/file/99650420226.pdf
    • http://brightwayconsultancyservices.com/userfiles/file/83606681241.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/v642gafb5iq1vo716rboovibds/mitazumejiposo.pdf
    • https://alihuata.com/userfiles/file/masujuxaguzolovop.pdf
    • http://vinag7furniture.com/app/webroot/files/editor_upload/files/saron.pdf
    • https://n95america.com/wp-content/plugins/super-forms/uploads/php/files/de69f34a7060618d6255ca8deb21bbbe/mesasime.pdf
    • https://chambredhotes-savoie.com/ckfinder/userfiles/files/34160617889.pdf
    • https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aba3208dee8---400161729.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=unitary+state+example
    • 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_off0000e743.bin
27024b122eba49fd3fc1c2d8f22afa726925bc898800408e683f1b37f97f45a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE743 16120 bytes
font_01_sfnt_off0000fca5.bin
3de3e9db310f080e81a3cac702e701c3f9cf22e071b76fe2c26c78fa113ab3b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA5 10516 bytes
font_02_sfnt_off0001149b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1149B 16792 bytes
font_03_sfnt_off00012cad.bin
f4bcf34173bf7dcdf4267c47f2a7daf31e0b4b16fed9a0426636730810fe8034		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12CAD 17760 bytes

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