Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c4208376c7adc41…

MALICIOUS

PDF

72.1 KB Created: 2021-09-29 00:49:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 2db78ee0dda24e203a6f16dad42d91ad SHA-1: 87f8b946e41e85302d9ce06e8a65afacb36d08d1 SHA-256: 2c4208376c7adc41f017e84922dd8ee378d95a2a9d45ac850cd3b7d9307503d0
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, many of which point to compromised websites or disposable hosting, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to redirect users to malicious content or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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://noavarservice.com/ckfinder/userfiles/files/zaluvumuvefe.pdf In PDF document text
    • https://rffsev.ru/wp-content/plugins/super-forms/uploads/php/files/bb213ca9f57069a61ea92528a17c9ed8/salisegifuzaxud.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140933cc4c74---30582148131.pdfIn PDF document text
    • http://chukgoobok.com/files/fckeditor/file/76087451706.pdfIn PDF document text
    • http://archetipoingegneria.it/userfiles/files/24933711196.pdfIn PDF document text
    • http://gzcaifeilai.com/ckfinder/userfiles/files/202109042223387066.pdfIn PDF document text
    • http://crosswaysrecruitment.com/userfiles/file/wubejiguxenikotixonora.pdfIn PDF document text
    • http://anindecor.pl/files/file/94750735917.pdfIn PDF document text
    • http://devveb.net/userfiles/file/sebid.pdfIn PDF document text
    • http://rungruangsteel.com/public/upload/userfiles/files/18420474312.pdfIn PDF document text
    • https://agrocare.ro/ckfinder/userfiles/files/mebowanudok.pdfIn PDF document text
    • https://netron.pt/app/webroot/media/files/81018925613.pdfIn PDF document text
    • http://bbmeti.it/userfiles/files/65740825018.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/1613df8f1541f9---95856217111.pdfIn PDF document text
    • https://nsaimmigration.com/userfiles/file/81432677177.pdfIn PDF document text
    • http://winterwonderlandzundert.nl/uploadimages/files/58170898846.pdfIn PDF document text
    • https://travelselection.us/wp-content/plugins/formcraft/file-upload/server/content/files/16133c8d74bfb7---7211838728.pdfIn PDF document text
    • http://esistore.de/userfiles/file/59188045803.pdfIn PDF document text
    • http://xn--80aafbkbafwdti1ahihccrg.xn--p1ai/pict/file/kuvisurekapaz.pdfIn PDF document text
    • http://yejida.com/userfiles/file/60612573163.pdfIn PDF document text
    • https://www.lang-mayer.de/wp-content/plugins/formcraft/file-upload/server/content/files/16153873e305a6---jotul.pdfIn PDF document text
    • http://clingac.es/d/files/golitugom.pdfIn PDF document text
    • https://www.pepinieres-gey.fr/ckfinder/userfiles/files/jizegavifojosiwoj.pdfIn PDF document text
    • https://zapret-rf.org/web/img/podborky/files/95505321071.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=vmix+pro+mod+apk+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_off0000b5e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5E6 17536 bytes
SHA-256: 331ee7ab936204d4170527b3e4ea7a76e74371e362f2793f35069cd9fd9faa0d
font_01_sfnt_off0000e2f1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2F1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000fb08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB08 10404 bytes
SHA-256: 68729e94cc69a4aa2341534101c8b39fe0c671b02babea5d39fad224010339d9

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