Malicious PDF — malware analysis report

Static analysis result for SHA-256 96613d75556e7c93…

MALICIOUS

PDF

81.8 KB Created: 2021-09-05 08:54:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d5d8ae9f394e5d3b8e63a6e78dff18fd SHA-1: 49dede1e1f882bf37e40b5fc452dfbe10d07d14c SHA-256: 96613d75556e7c9337239c05228436fe749b52735edc7764dbaf97f2029047b0
156 Risk Score

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a phishing or malware distribution campaign. The PDF itself appears to be a link farm, directing users to potentially harmful content hosted on various domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/1608c3b24e84c2---welofaxugipitejidof.pdf
    • http://www.contectrade.hu/fckfiles/file/vigaporomaxurosow.pdf
    • https://aguiapromocional.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a338814dee6---65785066258.pdf
    • http://lagunaapartman.hu/images/user/file/68764025234.pdf
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160a624899d8ec---nifafofanikutusuj.pdf
    • http://dianacb.cz/userfiles/file/nemebutilolidoguvonikomur.pdf
    • http://thefutureofgolf.eu/wp-content/plugins/formcraft/file-upload/server/content/files/1608eb3a2df99a---23172798813.pdf
    • http://deborahmayerlawoffices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/66595432358.pdf
    • http://cmtsport.com/pliki/vapewik.pdf
    • https://lightspec.com/wp-content/plugins/super-forms/uploads/php/files/7001ac05c4fe09b04e10c04a27eba97c/pomuzelikenuwowovujenim.pdf
    • https://vasutaszeneiskola.hu/ckfinder/userfiles/files/lodanidapavetibotonapov.pdf
    • https://www.oasipizza.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b91cb65771c---25668771403.pdf
    • http://southportrubbish.com/wp-content/plugins/formcraft/file-upload/server/content/files/161076b986cb16---52717809371.pdf
    • http://fxmeat.com/upload/file/f4c64c35387b1fd7470f49bee3354cdc.pdf
    • http://kasargod.net/uploads/file/wikulevexujovu.pdf
    • http://cafehinglung.com/uploads/files/63129728484.pdf
    • https://www.sgestrecho.es/wp-content/plugins/formcraft/file-upload/server/content/files/160a6b309c7a7c---48676248507.pdf
    • https://nazrabilisim.com/calisma2/files/uploads/dujefo.pdf
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/93ed05472715a0093eb6bb799a1f4cce/20953997494.pdf
    • http://verkoop-je-wagen.be/wp-content/plugins/formcraft/file-upload/server/content/files/16083433fc9ed4---bowunutodogodapo.pdf
    • http://studiostocchi.eu/userfiles/files/gebaxugejalawos.pdf
    • http://crm333.com/documentos/file/43339036996.pdf
    • http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/160980a0615038---bexal.pdf
    • https://hsse.cl/files/49118362948.pdf
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=aqualtis+washer+dryer+manual
    • 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_off0000dc99.bin
92a0359c6bc5901edbf9b96109bfb76300d487168f17ee677713fa8ac17f8c2b
pdf-font-stream PDF embedded font (sfnt) at offset 0xDC99 17128 bytes
font_01_sfnt_off0001088a.bin
4cac721de9f9406be46217f00c5809ff72f556ef9693c29bc20c381b4f197f15
pdf-font-stream PDF embedded font (sfnt) at offset 0x1088A 10820 bytes
font_02_sfnt_off00012138.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0x12138 16792 bytes