Malicious PDF — malware analysis report

Static analysis result for SHA-256 8248b8b0573dc86e…

MALICIOUS

PDF

81.1 KB Created: 2021-09-05 02:15:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 212a645499d0decb1fe2f20856bc77d4 SHA-1: 66902e4b4560fbca0c067cc33fe8a9d8daa95d71 SHA-256: 8248b8b0573dc86e17984bc92c82968eb87c6349ba55d098bb1eb090bedfcc23
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links pointing to compromised WordPress sites, acting as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The presence of multiple compromised CMS upload links suggests an attempt to obscure the true destination or leverage trusted-looking domains for initial redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://moma-restaurant.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090936448000---vawodigitikapeduwufa.pdf In PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-3/20210503170313959086.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/6ti34c4aoa8a1kbcge94limr80/vosesetepola.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070e1d6dfba4---73528430264.pdfIn PDF document text
    • http://ozt.zielonetarasy-cieplice.pl/uploads/userfiles/files/digosuma.pdfIn PDF document text
    • http://www.morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607d0e3dc5faf---91727201028.pdfIn PDF document text
    • http://www.lbtfilm.com/uploads/files/legigib.pdfIn PDF document text
    • http://daebokjungdb.com/uploads/files/66362142902.pdfIn PDF document text
    • https://dom4m.by/userfiles/files/47298223724.pdfIn PDF document text
    • http://www.fotografoeventimilano.com/wp-content/plugins/formcraft/file-upload/server/content/files/160964c4b92f32---tejifozifixedunijezibez.pdfIn PDF document text
    • http://baanpowertrain.com/wp-content/plugins/formcraft/file-upload/server/content/files/160baa3af4bb83---52075033736.pdfIn PDF document text
    • http://www.grundys.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/16071dc569afc0---61005108249.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/160a88515ca9f3---wugufurigepo.pdfIn PDF document text
    • http://churchontherockuk.org/home/churchontherock1/public_html/userfiles/files/koxikatumabarokowal.pdfIn PDF document text
    • https://malimbe.africa/wp-content/plugins/super-forms/uploads/php/files/00a6fbc1c58429bae4179e4a1cba2e9f/32947184104.pdfIn PDF document text
    • https://kodeac.com/wp-content/plugins/super-forms/uploads/php/files/ek82akhidd3n80dfh8i4oe320p/jeketafejalulufavujej.pdfIn PDF document text
    • https://www.certificagreen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cedf7bb88a---suruvagodoxamuxuz.pdfIn PDF document text
    • http://fhs76reunion.com/clients/0/00/009202203981f132fd14d012a57c0fe5/File/35484172108.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/f5fdac603cc6f6d7f24b807223242b87/57319363983.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b1536b1cc4---6237044808.pdfIn PDF document text
    • http://atol-res.pl/uploads/file/35014617533.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/16070f2163a9a7---perutumujaguboka.pdfIn PDF document text
    • http://protech.com.ng/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf97b8e13a---37539284619.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/PmAiG5ZyT-k/uplcv?utm_term=griffith+theory+of+fracture+pdfPDF 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_off0000d2f9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2F9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000eb0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB0B 19360 bytes
SHA-256: a4fe0426ab516818d03d048b8a4c39d155c38d97aba371e9b26f92f0d8dcbbbc
font_02_sfnt_off00011e10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11E10 10652 bytes
SHA-256: b0a3ce0e9052bd155c7894fcab19c69850b4b66d033daec1bf6f3a028349bf90

Open this report in the interactive analyzer, or submit your own file for analysis.