Malicious PDF — malware analysis report

Static analysis result for SHA-256 49ce085fdd4c9f2b…

MALICIOUS

PDF

87.3 KB Created: 2021-08-10 09:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: b2d761e05ff6cfc08d52e93553b5c76d SHA-1: b679e4afc52880e8cc152994d2ac7be5d2eb3548 SHA-256: 49ce085fdd4c9f2ba1b6299b93a0bffe27905903749ac173ccf050c459b376fc
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9414

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 http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/5e8c78d0d9aea929a00359767d3fd71b/57521258629.pdf In PDF document text
    • http://oppedisanorobertosrl.com/userfiles/files/zemukebikometesa.pdfIn PDF document text
    • https://tuabogadoangel.com/wp-content/plugins/super-forms/uploads/php/files/b1d16be097f1820852cc0e3c097ff99d/lulorojebukasur.pdfIn PDF document text
    • http://ip-golubev.ru/ckfinder/userfiles/files/37837647579.pdfIn PDF document text
    • http://skogsformedling.se/bilder_umeny/File/mekesuzunuvivevetipepune.pdfIn PDF document text
    • http://www.mvdisposal.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074012b975bf---89729682961.pdfIn PDF document text
    • http://www.appsolutely.sg/wp-content/plugins/formcraft/file-upload/server/content/files/160bc07e36ab00---88119683822.pdfIn PDF document text
    • http://xn--oy2b9bv81anouola.com/upload/file/202107251454388840.pdfIn PDF document text
    • http://dachastyle.com/userfiles/file/fujewivin.pdfIn PDF document text
    • https://rosewoodcity.org/nbloom/fckuploads/file/dobexenowalotima.pdfIn PDF document text
    • http://hieuchuan.com/upload/files/bojagogavagud.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160acfddb3eb3b---xobololimavigarisulule.pdfIn PDF document text
    • http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/0rqh1cai8cki4sd3lvpq6its80/mowufobil.pdfIn PDF document text
    • http://zxpgw.com/userfiles/file/18128774296.pdfIn PDF document text
    • http://lhs60to70.com/clients/3/32/32806278e47d7e4d905c37b1d6ebf04a/File/58675575220.pdfIn PDF document text
    • https://www.tonygssoulfood.com/wp-content/plugins/super-forms/uploads/php/files/3bf2b0bd93768115afbfacd9495850f7/gebugegutulunofedajo.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160ee72f0db2a0---85703421145.pdfIn PDF document text
    • https://torbay.ru/images/uploads/file/zotalotaseko.pdfIn PDF document text
    • http://alkanboya.com/files/file///nabaguvedakomorip.pdfIn PDF document text
    • http://vce34.ru/attachments/file/tubujelebenesomafapovulug.pdfIn PDF document text
    • http://myqself.com/upload/files/lopelafonebisalokimez.pdfIn PDF document text
    • https://wcdt.co.th/wp-content/plugins/super-forms/uploads/php/files/c7q5gdgfakfjt9pb3hmudr2g7g/luzididi.pdfIn PDF document text
    • http://ceskylakros.cz/userfiles/file/nisodatinasesuritonuzi.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/PmAiG5ZyT-k/uplcv?utm_term=la+la+land+watch+full+movie+onlinePDF 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_off00010136.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10136 10684 bytes
SHA-256: b09dd12601933d8d9b5dff005021e9d2f83e987fdd34640ca4d259458b8874c4
font_01_sfnt_off0001197c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1197C 16932 bytes
SHA-256: 97dceea49689b425a99144f34a15055e9e0b49fedb97d1fbb85c28c089aacf26
font_02_sfnt_off00014572.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14572 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1