Malicious PDF — malware analysis report

Static analysis result for SHA-256 bcebf53aee81c0e1…

MALICIOUS

PDF

102.4 KB Created: 2021-06-26 08:42:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f40b34ef2ebf41b034876dc431536453 SHA-1: d7cc07dfe24cd3cba856ef2f81c332da14b6e73a SHA-256: bcebf53aee81c0e15cf91232fda09c2972affe9bb3aa73ab98bb802adf16eb0b
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs that form a link farm, pointing to compromised WordPress upload directories and disposable hosting. The primary purpose appears to be redirecting users to external sites, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9737

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 https://coretry.ru/uplcv?utm_term=lass+and+lad+meaning PDF link annotation
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160b1ea4ca38dd---libefilujidi.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075f2592b917---584466121.pdfIn PDF document text
    • http://litho-and-co.fr/ckeditor/upload/files/70659452512.pdfIn PDF document text
    • http://2ds-creations.fr/userfiles/file/40954662045.pdfIn PDF document text
    • http://yangpupark.com/uploadfile/files/38008381974.pdfIn PDF document text
    • http://kistours.hu/userfiles/file/90384707857.pdfIn PDF document text
    • https://naseeha.org/wp-content/plugins/super-forms/uploads/php/files/df1034390cb8878b86e3a0af412f9861/wesekawopogosuzirupekuw.pdfIn PDF document text
    • https://yziact.fr/wp-content/plugins/super-forms/uploads/php/files/qihppn40ebvodqedie0tpo0ktl/rijobominejolerumakupov.pdfIn PDF document text
    • http://kpdb.org/userfiles/files/zunalalesukulo.pdfIn PDF document text
    • http://forter.vn/hinhanh/file/zabibonuwibaniwowodakibu.pdfIn PDF document text
    • https://graffitipaintstudio.com/wp-content/plugins/super-forms/uploads/php/files/e34965724848d0e9b9bfd424c580c077/xobalanedenedubidesexa.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160adaedb46456---37444495198.pdfIn PDF document text
    • http://localhomesales.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa526b24f4e---dosinupi.pdfIn PDF document text
    • http://xn--49s538bo8ux8c.net/userfiles/file/16903035068.pdfIn PDF document text
    • https://advicezone.org.uk/wp-content/plugins/super-forms/uploads/php/files/b3eamqk28nbljgu872i30q2pma/nevodaveragaxivisopip.pdfIn PDF document text
    • https://higher-reason.com/wp-content/plugins/super-forms/uploads/php/files/ctipdaupgtq43drfn1fihgb9m9/vopeberodonowejizukofewa.pdfIn PDF document text
    • https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160b836e6a6097---lipoduxojamewurapabatitip.pdfIn PDF document text
    • https://barcelonacentremedic.cat/files/galeria/files/98007537858.pdfIn PDF document text
    • https://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/c11a4f3911e4937711c447cb3dbedebb/52672104970.pdfIn PDF document text
    • http://www.pilonidalsinus.gen.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608238d2cb56c---68724055417.pdfIn PDF document text
    • https://maspacientes.es/wp-content/plugins/super-forms/uploads/php/files/5e6m3rsrf4khskdhv7l7etpjct/givipor.pdfIn PDF document text
    • https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/096006976c97dbbace23a121c286d22b/babaturup.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/60757e33d4af84cf48de9c7dbd4eee50/zinikis.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00012f43.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x12F43 19012 bytes
SHA-256: 3f8b611e101ccc0b57b7a081ea3f65591fd1e3bd36e015f309df651850408883
font_00_sfnt_off0000f31b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF31B 10232 bytes
SHA-256: 23da1cbac568687948acac25efa690e2202aa478ec06e16fd2073c21a943e836
font_01_sfnt_off000109bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109BC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000121c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121C9 3464 bytes
SHA-256: a8161c2f5ba9235eb51b4fcc43b6bb219725019365cb8d38f9ec25dfe5ce54ff
font_04_sfnt_off00014e5c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14E5C 25324 bytes
SHA-256: 779db0cfb7f0a59a57faeb201892ea3c4829e7c631b5f31e0a112f8977af1f48

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