Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae125c0e688a4304…

MALICIOUS

PDF

82.9 KB Created: 2021-08-25 19:51:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-17
MD5: 11038289ff37da01fa3d32883cccd719 SHA-1: 9dac74b9882427c0c4068a32ebfb9604a0e91464 SHA-256: ae125c0e688a430443f1f42bb2c4e3edfc74624eee06fe4cb50496cb84d7daeb
156 Risk Score

Malware Insights

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

The PDF contains numerous links, with several heuristics indicating it functions as a link farm. Notably, some links point to compromised WordPress upload storage, suggesting a tactic to host malicious content or phishing pages. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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://beamstraffic.ae/amb/userfiles/file/75431647787.pdf In PDF document text
    • http://www.itidharamshala.in/images/uploads/files/61053912972.pdfIn PDF document text
    • http://crmrealty360degree.in/ci/userfiles/files/77614688218.pdfIn PDF document text
    • http://www.leesii.com/wp-content/plugins/formcraft/file-upload/server/content/files/16084c147b1f69---vuvosoxiwobazogonogigab.pdfIn PDF document text
    • http://doggystylzgrooming.com/admin/photos/file/25697015605.pdfIn PDF document text
    • http://nutronicltd.com/userfiles/file/zopuxuruza.pdfIn PDF document text
    • https://rajatotogroup3.com/contents//files/nefamofup.pdfIn PDF document text
    • https://aulacvn.com/upload/fck/file/mupubegolafiwobozek.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160816ca58cc46---wawuzunosojokefonipo.pdfIn PDF document text
    • http://boxerdapolenta.com/cmsimple/images/file/lexekoxijud.pdfIn PDF document text
    • http://tpdw.pl/userfiles/file/76208475556.pdfIn PDF document text
    • https://halobysciton.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ab0dc85c2f---42822131939.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b71bb7aab6---12608088802.pdfIn PDF document text
    • http://sgd42.ru/userfiles/file/30664851428.pdfIn PDF document text
    • https://salubrismd.com/wp-content/plugins/super-forms/uploads/php/files/07c2d6cd3114f5e7738f4f74396ac5a5/99486234163.pdfIn PDF document text
    • http://viprealestatebrokers.com/userfiles/files/86060526539.pdfIn PDF document text
    • http://chothuethietbi.info/img/files/15172803020.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/b4a86c096ffb44d72988110a66dfb7b6/60260660957.pdfIn PDF document text
    • http://foire-fromages-et-vins.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b163a0ff68---40752671134.pdfIn PDF document text
    • http://rockpapersun.com/upload_mce_image/file/vorizizetope.pdfIn PDF document text
    • http://amoy-art.com/Upload/file/libituxowa.pdfIn PDF document text
    • http://bestbuyfromindia.com/userfiles/file/19346779237.pdfIn PDF document text
    • http://thomasbelldescendants.com/clients/40432/File/63695121062.pdfIn PDF document text
    • https://tortugafilms.ca/adminfiles/file/levigotipebulamisevutatex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=barbell+pull+oversPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e3eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3EB 10308 bytes
SHA-256: c5e7ff292c5440000e94345a60c53a9e07bbb1147f5e0b96b9335affe3e2026a
font_01_sfnt_off0000fb20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB20 16420 bytes
SHA-256: abd6990f821942a4be942c28848b37c28b67250c89ef5a67c8d76e5c2c603d8e
font_02_sfnt_off000125b3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125B3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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