Malicious PDF — malware analysis report

Static analysis result for SHA-256 172d0c0b7ad034e0…

MALICIOUS

PDF

90.6 KB Created: 2021-08-19 02:45:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: 7c5326a8768efadcaf936e5e31daf32d SHA-1: 4827cb467ae9eddcddf1d5f9681684a8dec49a24 SHA-256: 172d0c0b7ad034e07d904e61be88de3db3bfc6e4f2a417c1f8e8705569222902
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which point to compromised WordPress sites or disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9940

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://ketchas.ru/uplcv?utm_term=dil+hai+tumhara+full+movie+hd+720p+download+khatrimaza PDF link annotation
    • http://amazingindiaphotos.com/amazingindiaphotos//upload/fckimage/file/pejawalasagozenelukufafev.pdfIn PDF document text
    • http://www.biotanika.pl/upload/file/53680974023.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/f43ca25312bed8442ff81b84ab9c0885/rojaxazavi.pdfIn PDF document text
    • http://jpind.pl/userfiles/file/senageb.pdfIn PDF document text
    • http://aldercrest.com/files/josuvewukolarabimegal.pdfIn PDF document text
    • http://irths.com/upload_files/files/jitonikawivuxuba.pdfIn PDF document text
    • https://www.cibaospalaser.com/wp-content/plugins/super-forms/uploads/php/files/mjob3sg2pdaf03r5832sm46qen/50038009848.pdfIn PDF document text
    • https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/kkigno6puoo80tbc5lni1ivj17/36574009887.pdfIn PDF document text
    • http://technoauto.jp/js/upload/files/37081844143.pdfIn PDF document text
    • https://hgindustrial.eu/userfiles/files/zupifus.pdfIn PDF document text
    • https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160858c33e87c0---53737778622.pdfIn PDF document text
    • http://grupposcorcia.it/userfiles/files/mawobebejuw.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a7b73d5fb1e---30198394509.pdfIn PDF document text
    • https://fourseasons.events/wp-content/plugins/super-forms/uploads/php/files/ba14ca20e30d73b0c8f06dcf8f02fb01/gutuwebi.pdfIn PDF document text
    • http://yuha.be/_files/file/44809344148.pdfIn PDF document text
    • https://avenirpourtous.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16081953c9d5b3---75957461740.pdfIn PDF document text
    • https://refour.dk/wp-content/plugins/super-forms/uploads/php/files/91f92ef45f6ef8840bb5fb175d53aeb8/pakujexu.pdfIn PDF document text
    • https://adm.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/aee3312254dc95044611569eba72dec3/duxin.pdfIn PDF document text
    • http://hyundailed.com/upload/editor/file/betelefidi.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/160834a6463c4a---lejuxuloxaxika.pdfIn PDF document text
    • http://autobedrijvenindex.nl/images/uploads/19428993082.pdfIn PDF document text
    • http://www.nomorcantikjoss.com/file/20007707305.pdfIn PDF document text
    • https://familienbilstrup.dk/userfiles/file/zobawakaxiwifazuga.pdfIn PDF document text
    • 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_off0000e43b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE43B 11292 bytes
SHA-256: 1238fa877382e6be7b3aa329442aeb6fb3d121e2758ffd71a59aee7e7335db0b
font_01_sfnt_off0000feb0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C2 17724 bytes
SHA-256: 142a373c0893e1fcd9eb0f525ee4b351033d3cc181f0c59f806b2f63de10378e
font_03_sfnt_off00014532.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14532 16192 bytes
SHA-256: 97e3f73a58ccdd4784c9ae1678d9f90717e6b6d0c87c36bf93adb8865ef65ebd