Malicious PDF — malware analysis report

Static analysis result for SHA-256 49409950f30dfeb2…

MALICIOUS

PDF

70.6 KB Created: 2021-09-22 10:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: e08f849dec5ce67636f1199946f93d03 SHA-1: 96da373cb2e041c5f305dbcbc2bc2eccd3217171 SHA-256: 49409950f30dfeb2e55f5597d0bcdef8cf609827a1dadb29db617a7577fa83e4
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs, many of which point to compromised websites or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the nature of the URLs and the heuristic firings indicate a phishing or downloader attack pattern.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4846

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 https://garglob.ru/uplcv?utm_term=trevor+noah%27s+book+pdf PDF link annotation
    • https://museuminiaturesbesalu.com/files/33061578831.pdfIn PDF document text
    • http://barcabianca.eu/upload/file/molidefipadefepe.pdfIn PDF document text
    • http://www.olympussverige.se/wp-content/plugins/super-forms/uploads/php/files/bj71t9l5ke80vc30ifogqo1n1o/31150736083.pdfIn PDF document text
    • http://leylasuren.com/images/userfiles/imagefile/wudotinafusevidirasuzaxaz.pdfIn PDF document text
    • http://conelser.hu/fck_uploads/file/tubirujawona.pdfIn PDF document text
    • http://ahkkpcm.org/userfiles/39852784937.pdfIn PDF document text
    • http://rosesrealtyhomes.com/userfiles/files/lajosubemi.pdfIn PDF document text
    • http://vinhthuanvietnam.com/upload/files/20159352235.pdfIn PDF document text
    • https://www.peltonfell.org.uk/ckfinder/userfiles/files/473312605.pdfIn PDF document text
    • http://myphamasia.net/upload/files/femomixuxuzarofitodit.pdfIn PDF document text
    • http://sjhtractor.com/d/files/xawamuj.pdfIn PDF document text
    • https://podereilmontaleo.it/writable/public/userfiles/file/40005175714.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/44288534260.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/xafixizizorotaduwedix.pdfIn PDF document text
    • http://www.biharikft.hu/bihari-admin/ckfinder/userfiles/files/12326183802.pdfIn PDF document text
    • http://davidhammerstein.org/ckfinder/userfiles/files/30616453537.pdfIn PDF document text
    • https://baptistfriends.org/media/24273777023.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141ede056eb3---vekatifalenuvoxemakojav.pdfIn PDF document text
    • http://cherriestattoo.com/ckfinder/userfiles/files/faposud.pdfIn PDF document text
    • https://frennphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/161432ff4610d7---digodugejido.pdfIn PDF document text
    • http://ranjitabiswas.com/userfiles/files/zugamagipowusi.pdfIn PDF document text
    • https://debo-fit.be/userfiles/file///23019976097.pdfIn PDF document text
    • http://apsara.ru/userfiles/file/61819663053.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/41094648045.pdfIn PDF document text
    • http://t-eamplus.de/web/editor/files/85408778595.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/liluzopi.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_off0000be0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000d61e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD61E 16604 bytes
SHA-256: a436eaf4781c1131e8f8faee42b2807a812b224105f5b0787ac46cde9bd3612e
font_02_sfnt_off000100c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x100C4 10652 bytes
SHA-256: 2fc7f67d8508e9c6704e80b8117c623a56603ca75405bc0eb146920155beca85