Malicious PDF — malware analysis report

Static analysis result for SHA-256 8c2ed02c986f20f3…

MALICIOUS

PDF

81.5 KB Created: 2021-07-01 12:35:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 96860f25959166e9884573549b50133d SHA-1: 85cabcfb6ebe1c252fa93ddd5796ed9077a25f94 SHA-256: 8c2ed02c986f20f3da466e706c0c00e988f0578b987f64fc93076c6cefea442d
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to trick users into downloading further malicious content. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the overall structure and URL findings point to a phishing lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/84482765328bdd71536589b2b8c3f4bd/wavajet.pdf
    • https://www.edutechusa.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bc6ee148aa7---puvemesezawefusituxi.pdf
    • http://constructionone.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1607c17617da58---lesewitevasolovi.pdf
    • http://www.idenet.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a5db96ab900---91204018012.pdf
    • http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ba79885b8c1---44590101564.pdf
    • https://www.idahomedia.com/wp-content/plugins/super-forms/uploads/php/files/154ddd9cb327bde15b93d907072571e2/soxadafenaz.pdf
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d41644d917---7611396070.pdf
    • https://cambodiaangkorhomestay.com/userfiles/file/lukegunesajefixetep.pdf
    • https://airbays.com/userfiles/file/xokavanevutoxe.pdf
    • http://sarljarry.fr/userfiles/file/81449149962.pdf
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607f988e7c54f---83622907494.pdf
    • http://english-island.pl/wp-content/plugins/super-forms/uploads/php/files/4nnm2q80m97ko5sa12489godq6/webonaser.pdf
    • http://novussiteyonetimi.com/uploads/file/60399706653.pdf
    • http://alkanboya.com/files/file///xosatagolozefenab.pdf
    • http://alltechsro.cz/files/padebitadaforuvib.pdf
    • https://abugfreemind.com/userfiles/file/70109371358.pdf
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1608b2cdb9830e---88074010444.pdf
    • http://studiopignotti.it/userfiles/files/wemakuvomukasumitakut.pdf
    • http://phrabat.net/UserFiles/File/jebudagutalibupiwedef.pdf
    • http://maszyny.pl/userfiles/file/96193572261.pdf
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074fee057e60---jufolebipupizafeko.pdf
    • http://famcareconnect.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ad0325b5ca1---21521651025.pdf
    • https://xn--1--8kcai1ck2bs.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8bab1b2a784aa36687fc5cace36729e6/madosoxomusosu.pdf
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=the+area+of+a+half+circle
    • 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_off0000de64.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDE64 16792 bytes
font_01_sfnt_off0000f67b.bin
3e0933714704de2b5da0a5e630721de27eb4727e67b189c0fd5c74b25f16bfa1
pdf-font-stream PDF embedded font (sfnt) at offset 0xF67B 10028 bytes
font_02_sfnt_off00010cd1.bin
6f4dc388c7dac75fd4e5f025adebbba327c59d89f6153478cb0fa62366356225
pdf-font-stream PDF embedded font (sfnt) at offset 0x10CD1 16960 bytes