Malicious PDF — malware analysis report

Static analysis result for SHA-256 ed2868edc04cae1d…

MALICIOUS

PDF

81.7 KB Created: 2021-07-01 15:58:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 29fe72e4560b6ec82288f9a4ef1fc94b SHA-1: fb7fa35030849f5d88d80e570ed9b217d900e0f0 SHA-256: ed2868edc04cae1d32c811bb38c3bd09c87e3780260e81ecc2d2a2d8fbcc791d
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links to external websites, many hosted on compromised CMS platforms, suggesting a link farm designed to redirect users. The ClamAV detection and ML classifier strongly indicate malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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://pistant.ru/uplcv?utm_term=ca+ipcc+previous+papers+with+answers
    • http://www.birapart.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078de305a844---futupeli.pdf
    • http://www.asejnrtigers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16092629de5d0a---88354659737.pdf
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160984f6a5956d---bijifevepuwuzezotaxa.pdf
    • https://www.vibrationmonitoring.asia/wp-content/plugins/formcraft/file-upload/server/content/files/16094aa40d02a1---lumoba.pdf
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1609012d4a1941---zoruxamukanuguvodabador.pdf
    • http://kielcenoca.pl/files/file/bejaxofokevupof.pdf
    • http://sistersaviopublicschool.com/userfiles/file/vexoxarijititonuwiwiguwid.pdf
    • https://drvishweshwari.in/userfiles/file/vorudikasozemere.pdf
    • http://patroha.hu/file/11348771680.pdf
    • http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160712587170f4---nalujixugovonidam.pdf
    • https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d15fba36c8---kiviba.pdf
    • http://frederickfollows.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607e6d42419b4---65874776561.pdf
    • http://tms-technology.com/ckfinder/userfiles/files/lapepawujunazaxexi.pdf
    • http://www.fattyweng.com.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bc26bd4fa03---77433371384.pdf
    • http://lichnyiybrand.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089219cb74c4---75495405575.pdf
    • https://mosoptagro.ru/wp-content/plugins/super-forms/uploads/php/files/432af18f1f09a044d1b83c3ec45ba6b9/vopikuxipelu.pdf
    • http://antik-cafe-bergen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160890936a6b63---kudomuwuxivaniwawizov.pdf
    • http://myphamnanyno.com/luutru/files/gojesigive.pdf
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/hr82hp7qcebqk90cs1mpreohc7/32517748349.pdf
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/67e81fda8c8799012814ffc038b1d0a4/vufefomo.pdf
    • http://evabody.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1606cebd9929d8---fotifolowadopu.pdf
    • http://m-camper.ru/ckfinder/userfiles/files/2377412689.pdf
    • https://prikolnaya.com/wp-content/plugins/super-forms/uploads/php/files/843972e3b9e101b522790b52cdc305b7/18014187125.pdf
    • https://bishopsalamatkhokhar.org/userfiles/file/87493633609.pdf
    • https://accuratesearch.com/userfiles/file/sezifumasu.pdf
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/l6a9vpbpfgqttbbbsrdvc4mio2/28205078287.pdf
    • 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_off0000dd2b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD2B 16792 bytes
font_01_sfnt_off0000f53d.bin
bc1f366476087ea3c7638f696a410f2d43daf80e382b7191ec32314d48eacaff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF53D 16760 bytes
font_02_sfnt_off000120e6.bin
a50b390cd08ee3857abc3f571b7ff3e4fd26e0a7cc3a4246d159dde04fdee51e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x120E6 10708 bytes

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