Malicious PDF — malware analysis report

Static analysis result for SHA-256 e46b89d34f7883c7…

MALICIOUS

PDF

97.0 KB Created: 2021-09-04 03:59:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 9af3dda4276db2faa6b48f6cfbe9d385 SHA-1: 1f5f732f006fcf0ed56c731aef455107c8a03681 SHA-256: e46b89d34f7883c7fc833dc5a5d0a340dadddff98f68af2d2cae12c385e7aaba
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and an ML classifier, and contains numerous links to external websites, many hosted on compromised or disposable domains. The PDF structure and embedded links suggest a phishing or malware distribution attempt, likely using a spearphishing attachment as the initial access vector. No scripts were extracted, but the presence of multiple suspicious URLs indicates a high likelihood of redirecting users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5568

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
  • 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 https://cructi.ru/uplcv?utm_term=convention+solas+2016+pdf+en+fran%C3%A7ais PDF link annotation
    • https://shining4u.com/wp-content/plugins/super-forms/uploads/php/files/78f4c03ef3c7609382b4dd6e3b058286/25709625616.pdfIn PDF document text
    • http://keystoparadise.com/userfiles/files/gigoforizonumulise.pdfIn PDF document text
    • https://boumqueur-edition.com/upload/fckeditor/file/figowobemofezulekipezufa.pdfIn PDF document text
    • https://mimpi1pusat.com/contents//files/39935496570.pdfIn PDF document text
    • http://patanamachine.com/imgUpload/files/menusapigitosebudavubepum.pdfIn PDF document text
    • http://gewald.ru/content/Files/vawakonatetekivegi.pdfIn PDF document text
    • http://ooexperience.be/assets/Image//files/vixupaginuti.pdfIn PDF document text
    • http://uco-kampen.com/media/files/32084871421.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/77usho3fhngkllg4a3h6vne159/28720607156.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/matedinazu.pdfIn PDF document text
    • http://askort.pl/Upload/file/74857202992.pdfIn PDF document text
    • http://prime-standard.com/piceditor/file/sijuxuberiluwirugujuraguf.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160de2b4051214---kedalijipe.pdfIn PDF document text
    • http://w-f-l.de/user_img/file/38144228791.pdfIn PDF document text
    • http://banghetretruc.com/media/ftp/file/60809522725.pdfIn PDF document text
    • http://trips-in.com/ckupload/files/kulepizakukupipirefipu.pdfIn PDF document text
    • http://aiken7050.com/clients/5/51/510ae66c864a6d23552e02d1b5190e2c/File/viresupepozixegow.pdfIn PDF document text
    • http://heizler.hu/files/file/rozafoziboguvogugon.pdfIn PDF document text
    • http://supermarketdv.ru/files/file/bazufikujuwegotifojuni.pdfIn PDF document text
    • http://xn--80ackbssfuieecff0e8c.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/3g2tgstj6fcqq9at2tg8nkfmg4/48306680824.pdfIn PDF document text
    • http://keralabiblesociety.com/fck_uploads/file/vititorewowo.pdfIn 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_off00011c85.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C85 20648 bytes
SHA-256: b27ecc7cd2e7f8f42cf7118b663af0e89c72937b5d4f8c6bb78a6eeec5e84493
font_01_sfnt_off00015043.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15043 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001685a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1685A 11248 bytes
SHA-256: e376d7141c1b7161b014f0a7b62f01bc5d99cad021629f4cda52c074d2a275be

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