Malicious PDF — malware analysis report

Static analysis result for SHA-256 4871c42a0c0be84d…

MALICIOUS

PDF

84.2 KB Created: 2021-09-09 13:02:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 8eea1561ce903c51e45cc2d6cd0c54fe SHA-1: 2e7d68cfd6ff946cafeb2aa8a0cbc9811c30cf96 SHA-256: 4871c42a0c0be84d1aaeaf6edd2d21adcf5ac2c2230b3fc52f3c968b43f0ff4d
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It functions as a link farm, with numerous embedded URLs pointing to compromised WordPress sites and other disposable hosting. These links likely lead to phishing pages or further malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/efd2436b64de1e7c75751b80aeeff07d/lisufin.pdf In PDF document text
    • https://doluhosting.com/calisma2/files/uploads/tuwokiroribotazuxitigixop.pdfIn PDF document text
    • http://fiumevivo.it/userfiles/files/5460236457.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132c26983fac---bojinafu.pdfIn PDF document text
    • http://safiorida.dk/operatori/userfiles/file/75532098081.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/2ak4quqhmqc3pdpe2er9fog5s4/durabukazofasewifovuxu.pdfIn PDF document text
    • https://woodfur.in/userfiles/file/64615578696.pdfIn PDF document text
    • http://pokewaveanaheim.com/uploads/files/47461238055.pdfIn PDF document text
    • https://www.greenlakecruises.com/ckfinder/userfiles/files/40690067670.pdfIn PDF document text
    • https://ceccarmehedinti.ro/userfiles/file/galetokagizagop.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/16133b5beb9bc9---83911471411.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130dc359e77f---38839860355.pdfIn PDF document text
    • https://aawyx.com/sites/default/imageuser/file/69979306226.pdfIn PDF document text
    • http://aatmicscience.org/asuserfiles/file/14575396314.pdfIn PDF document text
    • https://peisheng.org/uploads/ckfiles/files/61305349b88d4.pdfIn PDF document text
    • http://hospitalityroyal.com/upload_files/file/jenamojugopuzupitov.pdfIn PDF document text
    • http://ucg-eg.com/userfiles/file/73259913756.pdfIn PDF document text
    • https://kiaavcilar.com/upload/ckfinder/files/kimifibewijegewam.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/16131859884017---kurirelezekumosekuju.pdfIn PDF document text
    • https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/87550242265.pdfIn PDF document text
    • https://www.barrau-philippe-sedeco.fr/ckfinder/userfiles/files/44163156834.pdfIn PDF document text
    • http://studionegro.net/userfiles/files/jewiwekuninotonalisi.pdfIn PDF document text
    • https://mimpisiluman.com/contents/files/5596305892.pdfIn PDF document text
    • https://abofahed.com/userfiles/file/98737235288.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=redmi+note+9+pro+rom+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_off0000e3f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F4 10684 bytes
SHA-256: 4dc4a625aec593b74f258bfd4c38cb01c7f6642a155aedacc9af93e662d777fe
font_01_sfnt_off0000fc74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC74 18104 bytes
SHA-256: 8d52666d07c056ae8250389d5081f048dcc7d0839c4d9d95eae12a8d123d03bf
font_02_sfnt_off00012afe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12AFE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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