Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12c23f27f5fa2e3…

MALICIOUS

PDF

70.2 KB Created: 2021-09-29 01:35:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: a2e5d13b6fc1a4c3a43398cdb4d7448a SHA-1: 50efa670c42f36c6be68c44abae1fbf04e8fe3d8 SHA-256: e12c23f27f5fa2e373be2165ba8f8a8279c9b989834587d04dd7c3afb2b03a50
156 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier and ClamAV as malicious, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to compromised CMS uploads and disposable hosting, suggesting a link farm designed to redirect users to malicious content. The document body is unreadable, but the heuristic firings strongly suggest a phishing or redirection attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://2018.letnifestiwal.pl/ckfinder/userfiles/files/19318531388.pdf In PDF document text
    • https://nodka.eu/ckeditor/ckfinder/userfiles/files/tavesoxetununegi.pdfIn PDF document text
    • https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/161378f192fe45---dufewaw.pdfIn PDF document text
    • https://bhopalliteraturefestival.com/mpsdp/uploads/files/mafijubogasikatowal.pdfIn PDF document text
    • https://kaptenhoki.info/contents/files/69649667264.pdfIn PDF document text
    • http://drvision.org/wp-content/plugins/formcraft/file-upload/server/content/files/1614876d3a4320---34979323603.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613332aa0fb8a---94101839561.pdfIn PDF document text
    • http://partnercable.hu/files/30271396838.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/812375033.pdfIn PDF document text
    • https://tradingphrases.net/userfiles/files/60938134517.pdfIn PDF document text
    • http://casier-a-bouteilles.com/file/80996914114.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614cfd0b77b7e---mabexozaziweji.pdfIn PDF document text
    • https://norservis.info/files/files/84359287964.pdfIn PDF document text
    • https://windsbs.biz/files/file/zozagoxomobabum.pdfIn PDF document text
    • https://erdenet.mn/userfiles/file/11768352770.pdfIn PDF document text
    • https://tekdalyapi.com/upload/ckfinder/files/tenogibufo.pdfIn PDF document text
    • https://bangvetthuong.com/luutru/files/nipozasisapojonumovet.pdfIn PDF document text
    • http://vincityhomes.vn/wp-content/plugins/super-forms/uploads/php/files/t0an6ojlhfbq7770mihg36694r/tosexus.pdfIn PDF document text
    • https://happy-playground.gr/uploads/_uploads/files/papid.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/57366076765.pdfIn PDF document text
    • http://tplustech.com/images/ckeditor/files/24560662538.pdfIn PDF document text
    • http://americasbestwingspa.iorderfoods.com/uploads/files/xozuzipepebevojubupufe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=3d+rose+live+wallpaper+full+version+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_off0000af25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAF25 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c737.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC737 16368 bytes
SHA-256: 16d065fdc27f544afaafaa28a94a6209d75db9fa4eb683224b1b99e14a40250e
font_02_sfnt_off0000f0be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF0BE 10720 bytes
SHA-256: 6dfd3ac4603fd0a674092c552e56c39a62daf9e579f7740afcea58bf2f90943a

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