Malicious PDF — malware analysis report

Static analysis result for SHA-256 556057fd24311a78…

MALICIOUS

PDF

89.3 KB Created: 2021-08-01 05:24:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 8dcc51974f9d4c8cc78344f54518e5f4 SHA-1: 99d596a3121de391fb3df9db4ea3a8779683ba94 SHA-256: 556057fd24311a7896a5b918e96aca4a93adc05a16894d08e38556acbe35f86b
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with several pointing to compromised CMS upload directories, indicating a potential distribution point for malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery through these links. No scripts were extracted, limiting the analysis of direct execution vectors.

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://clubesquilacoma.com/uploads/files/28773963852.pdf In PDF document text
    • https://www.mnspineandsport.com/wp-content/plugins/super-forms/uploads/php/files/c45be482c180c202d3bcb41c9d77eccc/pujuvoxubavulazo.pdfIn PDF document text
    • http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16088506350fac---26179800378.pdfIn PDF document text
    • https://globalybm.com/ckfinder/userfiles/files/1625871573.pdfIn PDF document text
    • https://blsautomation.com/ckfinder/userfiles/files/52681828636.pdfIn PDF document text
    • https://www.justgym.co.za/wp-content/plugins/super-forms/uploads/php/files/9iapn25bq4aotgbja9962oid82/pazekenejenexabuj.pdfIn PDF document text
    • https://www.hungryalex.com/wp-content/plugins/super-forms/uploads/php/files/re4ieb78q3e7v1l8021dv4eb1h/74238250992.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a048027cc2b---liburesilobesibikonoku.pdfIn PDF document text
    • https://mamo-tato.ro/userfiles/file/tolof.pdfIn PDF document text
    • https://e-uchebnici.com/img/file/2884779513.pdfIn PDF document text
    • https://faresaldabbous.com/uploads/files/15520189686.pdfIn PDF document text
    • https://gregor-biffiger.ch/userfiles/file/31771079120.pdfIn PDF document text
    • http://dichvugiayphep.biz/upload/ck/files/37677937805.pdfIn PDF document text
    • http://modellszerviz.hu/userfiles/file/31075531504.pdfIn PDF document text
    • http://all-pass.com/folder/editor/file/vemiwibokalim.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1608ae367bad6f---jaragezisaxuzomikubiveka.pdfIn PDF document text
    • http://xn--b1ahhafccpgkb2bxo.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/50214681567b3e81bdf53e8e8f09d619/20906242722.pdfIn PDF document text
    • https://metroguards.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160875eabbc512---37215648216.pdfIn PDF document text
    • https://premium-house.uz/images/file/davawujifib.pdfIn PDF document text
    • https://optimustelecoms.com/ckfinder/userfiles/files/moxerepipadebuwiw.pdfIn PDF document text
    • https://ifacemount.com/wp-content/plugins/super-forms/uploads/php/files/ug301n4jm955oojc8ltodnh9jv/xizebapo.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1607c7582177bf---lijovusagafumorew.pdfIn PDF document text
    • http://elenasteele.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077a072dcd44---42027736079.pdfIn PDF document text
    • http://vadihosting.com/calisma2/files/uploads/49904191270.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=children%27s+songs+in+tamil+movies+mp3+free+downloadPDF 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_off0000f7da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF7DA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010fec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FEC 16904 bytes
SHA-256: 2cf748d7b9dbc89c048ad0a20e50dc4757c02e4aeed91dec7fa6653b2d44f159
font_02_sfnt_off00013c07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13C07 11336 bytes
SHA-256: 239a06937fa3d9965d882cdda6ee107fd4d50cf7a94637be92e2e4853c80db8d

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