Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e2192a2d4ca98a6…

MALICIOUS

PDF

96.1 KB Created: 2021-08-07 08:09:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-23
MD5: 94057af0c11493e4e4c0a51a68fed91b SHA-1: 975ea05f259f92cfdc66e269c5a3c5718cb4ca28 SHA-256: 9e2192a2d4ca98a61c31d44400ca0bab67cf333a5c72f6906ab3fc48db13b750
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9768

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://nd-58.ru/wp-content/plugins/super-forms/uploads/php/files/2c6464039f6d559b914b8d026f97b3a7/bewibu.pdf In PDF document text
    • http://annandale1963.com/clients/69704/File/raxafuzezawozokijedemiv.pdfIn PDF document text
    • https://www.chartsunlimited.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/16079cfd3a6554---58292611447.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/43532383086.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160cd976493cb4---sosajodigema.pdfIn PDF document text
    • http://fqcycpa.com/jingkelun/userfiles/files/20210705085615.pdfIn PDF document text
    • https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/836321a6355f36de622cb7578a062274/10554534585.pdfIn PDF document text
    • http://dvg.asia/ckfinder/uploadfiles/files/xumemevusukojunozafudelez.pdfIn PDF document text
    • https://monacollection.ua/wp-content/plugins/super-forms/uploads/php/files/76ebebfdd313b799e4970be7e0ceb8b5/zolawedevala.pdfIn PDF document text
    • http://alumcity.ru/userfiles/file/27894374357.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/6b5d54b9c32e39480194c5bcc2c1c37c/42653575968.pdfIn PDF document text
    • https://buka.ru/sadm_files/92453174295.pdfIn PDF document text
    • http://skoleniridicu-online.eu/ckfinder/userfiles/files/jisudifipekotipi.pdfIn PDF document text
    • https://bilbox.es/wp-content/plugins/super-forms/uploads/php/files/9fdbeb18b07b90aa0b0d0cc41dc7ca2a/87587616160.pdfIn PDF document text
    • http://milcontabil.com.br/wp-content/plugins/super-forms/uploads/php/files/ehrvob5jkm83cfdomklm6f9b70/22828888343.pdfIn PDF document text
    • https://www.ideaklinikkadikoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5aef9b8f34---muxajudubomomoru.pdfIn PDF document text
    • http://sun-tes.ru/files/file/vagaxit.pdfIn PDF document text
    • http://naasschoolofmotoring.ie/fckeditor/userfiles/file/lujoxomabenobetixarigew.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/f6df8a127d9e9ce2ced63782d5f391aa/mafabetuguwafobov.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16085e7ec636ff---zeserumukedewubisik.pdfIn PDF document text
    • http://tuzvedo.hu/elemek/file/43073736685.pdfIn PDF document text
    • http://www.holderit.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082cf8497c0a---64725572976.pdfIn PDF document text
    • https://www.fecomerciomg.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/16071ed4115888---luxamaruputaguximegumal.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a720611e179---80415970666.pdfIn PDF document text
    • https://soechi.net/userfiles/file/67999599255.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/1607160a55895b---67942337678.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/fzgW7-mxBc0/uplcv?utm_term=do+el+camino+japon%C3%A9s+de+la+felicidad+pdf+gratisPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f74e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF74E 11248 bytes
SHA-256: 9c460acadd6e6e92e0ba49227bf8a4120770f3c616773f665d2d460fedb8b969
font_01_sfnt_off0001110f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1110F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012921.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12921 19200 bytes
SHA-256: b98b2659b0be39c8816326f1840080524df695f40b8535498e03e065b488524c
font_03_sfnt_off00015992.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15992 16312 bytes
SHA-256: 7d15b2d6d265aaca51dda18faee70a1b8fa9d95ed54cb111fb0895789092f9ae