Malicious PDF — malware analysis report

Static analysis result for SHA-256 b037171478e22fff…

MALICIOUS

PDF

90.3 KB Created: 2021-06-28 05:15:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4a10ac15c047de712824e76101dd2039 SHA-1: 4ae463669f0e5f5ea4a1633357c742b66a994b71 SHA-256: b037171478e22fff9f842164538b2d0f311c20c968fa59713d2bcdd6666f5146
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm, directing users to multiple compromised WordPress sites and disposable hosting domains. The primary goal appears to be directing users to malicious content or phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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 https://balance-global.com/wp-content/plugins/super-forms/uploads/php/files/01vjrn2e9a0c4hjmfomqj5e89a/samijikufabexobadajeri.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160722d5234e88---voxigudujidu.pdf
    • http://soft-pro.hr/upload/datoteke/jisemuletavusogimat.pdf
    • https://sitebyside.ru/wp-content/plugins/super-forms/uploads/php/files/3c8fb37a6318be728931aaa2c7bd8006/77875006283.pdf
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/1d7e5f921a5f1dd5a366dd62d5757c76/kuvibip.pdf
    • http://timavoshipsupply.it/userfiles/file/50555706882.pdf
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c89e8367ec7---98507931226.pdf
    • http://www.virtualaid.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608d12c21df0e---kiburofexo.pdf
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/23b42c2abc6db5c58fd17669a1a3318f/darupuzubagulekarij.pdf
    • https://www.drserapkagan.com/wp-content/plugins/super-forms/uploads/php/files/jhu4lvfpct1i5atjtk2fujm061/goniruketumozumavowo.pdf
    • http://irmascaritasdejesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608e5bbab00d0---85387175773.pdf
    • https://lightspec.ca/wp-content/plugins/super-forms/uploads/php/files/e390791539a1c04892e888245f66e14f/31630160476.pdf
    • http://fotografiafrancescosomma.com/userfiles/files/tuduginukonaf.pdf
    • http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160b3a267d7b07---feguzibepokonabikixilibov.pdf
    • https://endoaccessories.com/wp-content/plugins/super-forms/uploads/php/files/7gi4ls061u8e8ne4uq7t01eed7/wakivukumadokenini.pdf
    • http://mazdooradda.com/userfiles/file/jidukisomodipofano.pdf
    • https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078237ed5feb---5500143965.pdf
    • https://chocoinmobiliario.com/wp-content/plugins/super-forms/uploads/php/files/893e525c6d2f2e20fc0d7986c151cc7d/vulunezexubozuramoza.pdf
    • http://eachfun.com/ckfinder/userfiles/site_eachfun_com/files/petafuruzu.pdf
    • https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/3aeb5633572d3aa31dfe12ba9b739e42/19440936713.pdf
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160d556f6ace3d---novomeka.pdf
    • http://ar-intl.net/wp-content/plugins/super-forms/uploads/php/files/t67tgopps1pec64260090pard2/jopovazof.pdf
    • https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160890a10277a1---93092675903.pdf
    • http://dermalab.pl/userfiles/file/suzitoxorijov.pdf
    • http://ciaooo.ru/uploades/userfiles/file/goruw.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=left+side+of+mouth+numb
    • 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_off0000ff06.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF06 16792 bytes
font_01_sfnt_off0001171d.bin
4d440ed4493a50223fe6643d076e310ec396b9f4bcd2ab581005c3229c25c0dd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1171D 10508 bytes
font_02_sfnt_off00012ed2.bin
e5ab49c11e9ad6d53bd59d09d15ae1294656c0e3a3c465682604a8b2b9cf3848		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12ED2 17340 bytes

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