Malicious PDF — malware analysis report

Static analysis result for SHA-256 29750980e33b5d86…

MALICIOUS

PDF

96.9 KB Created: 2021-09-04 19:05:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2a89f3cc6750c1e3661777058219d870 SHA-1: fc2d3e997d6a5d85d10667d92db03ed2a96152f7 SHA-256: 29750980e33b5d866754fe1d5b769912870b9ccc006b646a6e41849c9f6373e8
156 Risk Score

Malware Insights

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

The PDF contains a large number of links pointing to various websites, many of which are hosted on compromised CMS platforms. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The document's structure as a link farm suggests it's designed to lure users to external, potentially malicious, sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9929

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://mokshadhamnepal.org/userfiles/files/68135381022.pdf
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ede6ec64f6---957377957.pdf
    • https://chetanaus.org/bheru/uploadfiles/file/47627525386.pdf
    • http://naturalmis.com/userfiles/file/94679662820.pdf
    • http://geoplan.su/userfiles/file/87053989336.pdf
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/36f918d9108ae7a3ae0ac0926eae3ed9/57763606138.pdf
    • http://middlegeorgiacoinclub.com/wp-content/plugins/formcraft/file-upload/server/content/files/16097a5fdd6132---14233985243.pdf
    • http://satbietthu.com/luutru/files/79320152983.pdf
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16082a6740cd28---bilegijiruja.pdf
    • https://divorcioconsensual.com.br/wp-content/plugins/super-forms/uploads/php/files/8073488ef1d7867d39542cac618ae102/3434391294.pdf
    • http://www.accl-calibration.com/login/ckfinder/userfiles/files/gijaxu.pdf
    • https://krossi.ru/images/content/files/79930530388.pdf
    • https://moyaexpresss.com/ckfinder/userfiles/files/45368496760.pdf
    • http://hbtsap.com/Upfiles/news/file///55200134061.pdf
    • https://www.litesourcenc.com/wp-content/plugins/super-forms/uploads/php/files/000157679306344547030b4a4fabf5a7/konaxetij.pdf
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/16107950e21ddf---38738017210.pdf
    • http://erbilsunhotel.com/wp-content/plugins/super-forms/uploads/php/files/lc2jtc7v5fndd22nihpunvqfd5/monepoja.pdf
    • https://polskieplytki.com/wp-content/plugins/super-forms/uploads/php/files/85f0c7b58fedb6c0bb15850b29941c27/64798554405.pdf
    • https://ozmutludokum.com/userfiles/file/99023729425.pdf
    • http://sunnysideclassof64.com/clients/a/ac/acc4ccb49d7935ca36198347b895393e/File/wakoredix.pdf
    • http://e-sheremet.com/img/xowulisegufu.pdf
    • https://smoothnomad.com/wp-content/plugins/super-forms/uploads/php/files/40d1mmej49femalojosgfqenpm/45605107629.pdf
    • https://ever-progress.com/upload/files/xezukupufepuvavexevowo.pdf
    • https://xn----9sbccjdbca7cyaieg1a3j.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/8775d12cb11c07fa3d44e93b4e9721c2/93474348266.pdf
    • http://orbitsecurity.qa/pro_mvp_tech/uploads/file/ruwawobali.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=metric+system+review+worksheet+answers
    • 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_off00011496.bin
8c31b3979d803ba2ca5fcadd036afb2e53eee21f99a2471ac74a391652a560d5
pdf-font-stream PDF embedded font (sfnt) at offset 0x11496 10800 bytes
font_01_sfnt_off00012d73.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12D73 16792 bytes
font_02_sfnt_off00014585.bin
5bdabb4ffc2121eb1288875d1f64667b080eeae85acee51133d09719c6e0a459
pdf-font-stream PDF embedded font (sfnt) at offset 0x14585 18676 bytes