Malicious PDF — malware analysis report

Static analysis result for SHA-256 34d69eebd7c2c569…

MALICIOUS

PDF

174.4 KB Created: 2021-06-29 13:31:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0ef5e0e7c02e0b9170042817bf09bbf6 SHA-1: 7e8f987ba92a4cb44a51a21a73fe0239a69dec51 SHA-256: 34d69eebd7c2c569d9076d1eac9282f56148ff03c138faadefc5f55d30446d8f
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV. It functions as a link farm, containing numerous URLs pointing to various websites, many of which are hosted on compromised CMS platforms or disposable domains. The primary purpose appears to be redirecting users to potentially malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9937

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://pointswestliving.com/ckfinder/userfiles/files/mimikotobapakasevuwe.pdf
    • http://associacaoguainumbi.org.br/wp/wp-content/plugins/formcraft/file-upload/server/content/files/160a2e0309cc24---sujoxalaxugareserefojes.pdf
    • http://morethancars.nl/uploads/edytor/file/kozokoxaxutizituwolopi.pdf
    • http://myucmas.com/userfiles/file/zenanuliguwepoxilasedivo.pdf
    • http://thuduchouse.vn/pics/file/45109826998.pdf
    • https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/e69f4afa17fcfa0ae7ed447abbb053cd/99811269877.pdf
    • https://fmpride.com/wp-content/plugins/super-forms/uploads/php/files/ce720bc0cf6cc9fc826d560863147949/felivozaposufutabokimifes.pdf
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/399eb794da3d84bfddb5bb45d65200fe/42864106734.pdf
    • http://subventionsbetrug.de/wp-content/plugins/super-forms/uploads/php/files/fo76ni6ngfe3l2s2l7m13i2f0e/1240675046.pdf
    • http://jjinline.org/file_upload/file/59490113339.pdf
    • https://kindliving.org/wp-content/plugins/super-forms/uploads/php/files/tmp/37764898761.pdf
    • http://vieclamquantri.net/upload/files/87866829856.pdf
    • http://aksaaydinlatma.com/img/editor/image/file/86532676277.pdf
    • https://www.siemers-deutschmann.de/wp-content/plugins/super-forms/uploads/php/files/bpdai83b43mg34eu2sv78vjs9b/12083433932.pdf
    • https://djhelaly.com/wp-content/plugins/super-forms/uploads/php/files/fde60b40035f7d4f7e6bde5f570097e5/nugukewubodef.pdf
    • https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/160735bdf374da---75966022894.pdf
    • http://mikailang.net/userfiles/file/20210505142400_647669123.pdf
    • http://lbhs1965.com/clients/6/6b/6bdd8f708684a1f547efbf97e1630fe5/File/37043389584.pdf
    • https://www.ndgai.com/wp-content/plugins/super-forms/uploads/php/files/iqreb2ivj3e8qiqs68lbf3egqs/janaruwoxirokugoxilosufiz.pdf
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/rr3odpucgbnv92ftjh95bu6085/fusumo.pdf
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/160946b9d9d189---fekizupida.pdf
    • http://ratchadatitan.com/UserFiles/File/rolisazudekajawegejifof.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/3vuEKuznOb8/uplcv?utm_term=probably+the+latter
    • 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_off00024af1.bin
1a64f46e9c3f64e455c231d47f2b53d3a73a8cbc49ff6f1020595739dea1356f
pdf-font-stream PDF embedded font (sfnt) at offset 0x24AF1 18676 bytes
font_01_sfnt_off00027c20.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x27C20 16792 bytes
font_02_sfnt_off00029437.bin
62e2b3a1b22573ef9fcc6db94ee9c070e452b44180b27fb128ef384e291c6f24
pdf-font-stream PDF embedded font (sfnt) at offset 0x29437 10096 bytes