Malicious PDF — malware analysis report

Static analysis result for SHA-256 1eeaa0c4dec690f4…

MALICIOUS

PDF

74.1 KB Created: 2021-09-01 23:19:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: e20a202b7c8d1c94935e047740d3f9ab SHA-1: d17369674cb1e9b7c20d10e0377b5050703d6e37 SHA-256: 1eeaa0c4dec690f4baaecf7e42162b014a263de9f453f4a60c59985f0b3d0f16
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links, many of which point to compromised WordPress sites or disposable hosting, suggesting a link farm designed to distribute malicious content. ClamAV detected this file as a phishing trojan. While no scripts were explicitly extracted, the nature of the links and the ClamAV detection strongly indicate a phishing or malware distribution attempt, likely delivered via spearphishing.

Machine Learning

  • Nyx PDF Classifier clean score 0.2136

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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://gibisch.biz/files/files/rarew.pdf In PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/160db611790ff0---52078971753.pdfIn PDF document text
    • https://militarynetwork.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160764bb51b6ab---73191505632.pdfIn PDF document text
    • https://daynexweb.com/upload/ckfinder/files/vinokowejogodabafa.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160cbe73a0edad---fupukoxoruxanogikiwakumox.pdfIn PDF document text
    • http://dongkoo.com/uploads/editor/files/67606443697.pdfIn PDF document text
    • https://vanvoorst.info/uploaded/file/25929433420.pdfIn PDF document text
    • https://vaytieudungtragop.com.vn/wp-content/plugins/super-forms/uploads/php/files/sgjj4uh7e89ji95o849jvqgdp3/22363591626.pdfIn PDF document text
    • http://avatars.ru/userfiles/file/jowiwonavamelomog.pdfIn PDF document text
    • http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e9db50e56---rizewuvawuduwezumar.pdfIn PDF document text
    • http://retailcop.ca/files/befuvatusajagemubaf.pdfIn PDF document text
    • https://speeddating.lt/speeddating/ckfinder/userfiles/files/78272283301.pdfIn PDF document text
    • http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16117121524d49---xemutovalodi.pdfIn PDF document text
    • http://www.shipsupply.co.mz/wp-content/plugins/formcraft/file-upload/server/content/files/160fbd273b2db2---75608559750.pdfIn PDF document text
    • http://actlogistic.vn/upload/editor/files/mezad.pdfIn PDF document text
    • http://woori-tour.kr/FileData/ckfinder/files/20210716_7C7BCF9EBE696AA6.pdfIn PDF document text
    • http://capitolmetrophysicaltherapy.com/userfiles/file/10268165093.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/a40fde6ebbc32e00e0c146633e47ecf5/80370098420.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160eca2e9edf22---56211200390.pdfIn PDF document text
    • http://radio-salsa.fr/php/rs/filesupload/file/bepudowexoxuravoze.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607383718e96e---40781847824.pdfIn PDF document text
    • http://inarchengineering.it/userfiles/files/27322146831.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/j29f8gbo971mgbrg3kt9l9308d/ripagizuda.pdfIn PDF document text
    • http://dabien.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/16100df59c02c2---jovazekutagolusigo.pdfIn PDF document text
    • https://cambodiadriverservice.com/userfiles/file/rejalojuninew.pdfIn PDF document text
    • http://hjtech.org/admin/upfile/file/nufekobibajodudatitidoxe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/LPIa9PGmDLg/uplcv?utm_term=the+diary+of+a+wimpy+kid+pdf+downloadPDF 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_off0000c368.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC368 10752 bytes
SHA-256: 38856cd175f6f8b8bcb5d6f12fead5006f3269e88a5b5de983c8c0190a209cb5
font_01_sfnt_off0000dbf3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBF3 20404 bytes
SHA-256: 7e6857f1069259365a29008aff715bdac6f098f40e02786f97e7e4710e2daae5
font_02_sfnt_off00010eb2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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