Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1a6e7c782538e71…

MALICIOUS

PDF

211.0 KB Created: 2021-07-24 15:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d4a1b42f461b4666811a6930f2e9e697 SHA-1: 81061c28b0f9f9c4f14d8572e0b7436b84fe5de3 SHA-256: f1a6e7c782538e711a1fd1dceb804b0b6e7e7ff5c92a9031f6e14efa0f00cfad
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains multiple links to compromised WordPress sites, suggesting an attempt to host and distribute further malicious content. The presence of PDF_RANDOM_URL_LINK and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics confirms the malicious linking behavior.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7952

Heuristics 5

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://rugsinc.in/UserFiles/files/kipibenigubinepew.pdf In PDF document text
    • http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160d1c00c353ee---77070649472.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160b452bcd099b---79617011471.pdfIn PDF document text
    • http://wakingbeauty.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a86d58b55b1---rufozesogesebilepej.pdfIn PDF document text
    • http://fenotropil.ru/userfiles/file/kimutigovokozesarinu.pdfIn PDF document text
    • http://goraku-sangyo.com/userfiles/file/kuror.pdfIn PDF document text
    • http://msslink.ru/userfiles/files/bevodevisupegifalalab.pdfIn PDF document text
    • http://hak-al.com/resimler/files/36930553798.pdfIn PDF document text
    • http://dienmattroigiasi.com/uploads/files/fezenupuwejosuruto.pdfIn PDF document text
    • http://shosholoza.de/file/13761695275.pdfIn PDF document text
    • https://ltanimalpark.com/wp-content/plugins/super-forms/uploads/php/files/e830b401e6f4c70f1a8dab8138402d81/petifegixifupatum.pdfIn PDF document text
    • http://sehs67.com/clients/e/e0/e078d4d0076166a7bb489ca3b3a583ab/File/25189944260.pdfIn PDF document text
    • https://ecobox.eng.br/wp-content/plugins/super-forms/uploads/php/files/71h4bltf83f8jliepi0gqndsb2/86610886613.pdfIn PDF document text
    • https://www.fmworks.com.tr/wp-content/plugins/super-forms/uploads/php/files/1lpef2u65a7qu1dc1u79u7e23f/7047307590.pdfIn PDF document text
    • http://www.sunarnuricomuisvealisverismerkezi.com/wp-content/plugins/super-forms/uploads/php/files/t5r4dvqgmf34duib5ep1p0bam5/lurabidetetigezave.pdfIn PDF document text
    • http://mstreatmentadvances.com/userfiles/files/37332431762.pdfIn PDF document text
    • https://ivanamihic.com//files/fateromekebomul.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/gugoxekarikugoxofaxiwenut.pdfIn PDF document text
    • http://kochamsushi.pl/UserFiles/file/rivonesanuliwixaguge.pdfIn PDF document text
    • https://ahha.az/userfiles/file/74154493051.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607bb251cc263---91728897727.pdfIn PDF document text
    • http://www.adatechotomasyon.net/wp-content/plugins/formcraft/file-upload/server/content/files/160abd99fe55a4---xifusede.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/Om9ozkHLxGw/uplcv?utm_term=scp+containment+breach+mouse+bugPDF link annotation
    • 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_off0002e0c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0C8 11092 bytes
SHA-256: 13807f385933f4f5e26119ffe45b38ecf49d7adaa43fde1457e76482c08b751d
font_01_sfnt_off0002fa3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA3D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003124f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3124F 19540 bytes
SHA-256: 4b2f5049ebde46aa68dd0fa09dcb1d4ecf53c098079bcb95f99ae2c8860e2db6

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