Malicious PDF — malware analysis report

Static analysis result for SHA-256 f754013770b34f8f…

MALICIOUS

PDF

84.8 KB Created: 2021-09-06 04:35:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 9a0206b2a138eeb86c8154fdab7afe1b SHA-1: ad438485ec2859efa395c6977d64cfe9a65b07f8 SHA-256: f754013770b34f8f52d79cccee623d12c46237ed35e5517385cc7d688045cccd
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a link farm pointing to numerous URLs hosted on compromised WordPress sites, suggesting an attempt to lure users to malicious content. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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://cructi.ru/uplcv?utm_term=parrilla+de+induccion+supra+manual PDF link annotation
    • http://scissortailfarms.com/wp-content/plugins/formcraft/file-upload/server/content/files/160731f9279499---vudefekilozu.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/0e7a3a3d208f6a23852f7f5699f4a279/82399097324.pdfIn PDF document text
    • http://metrocars.london/survey/userfiles/files/tevufexovudodoxopapasabog.pdfIn PDF document text
    • https://jakspravnenapsa.cz/userfiles/file/raxumetufipigamatuxorolo.pdfIn PDF document text
    • http://booklandbooks.com/userfiles/file/31420422918.pdfIn PDF document text
    • http://raduzhniy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612c745d312cf---53783060919.pdfIn PDF document text
    • http://jjmcp.jp/userfiles/Image/file/638493559.pdfIn PDF document text
    • http://amwordpress.org/wp-content/plugins/formcraft/file-upload/server/content/files/160b7d01907504---nisiw.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/160897190b4df9---livetuze.pdfIn PDF document text
    • https://tese.in/ckfinder/userfiles/files/molimogikapa.pdfIn PDF document text
    • http://villaturri.it/wp-content/plugins/formcraft/file-upload/server/content/files/160f6ca8d3bb44---derite.pdfIn PDF document text
    • https://majubesar.info/contents//files/dedebitak.pdfIn PDF document text
    • https://simondaulte.com/ckfinder/userfiles/files/46738314024.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6b2615a4f8---xubiduroxef.pdfIn PDF document text
    • https://festivalecolo.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609fbf9337643---22353283383.pdfIn PDF document text
    • http://tiwtactic.com/userfiles/files/rilaro.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/995e0e7d97a0e11a135b3586c21e5316/97939230783.pdfIn PDF document text
    • http://jolanyee.com/upload/files/202109060850386525.pdfIn PDF document text
    • https://pirkitpadangas.lt/ckfinder/userfiles/files/nakafojoxifu.pdfIn PDF document text
    • http://seamacros.com/upload/file/4915038503.pdfIn PDF document text
    • http://aranykoronakft.hu/userfiles/file/ferunaforufelojos.pdfIn PDF document text
    • http://abwrichmond.com/uploads/files/24309340113.pdfIn PDF document text
    • https://www.nosolodespedidas.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607980851b5c0---62435691306.pdfIn PDF document text
    • http://www.nbrownies.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609da2c3b2501---tewunageperexisane.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e0fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE0FA 20128 bytes
SHA-256: e49b1ab3a3470936ff5874fbafde5a3d9e474b62f55e44f912b569a7b912081c
font_01_sfnt_off000114ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114AC 10680 bytes
SHA-256: ca6419527a574c7aed2d8a7973e648e3a1eeffc4be8d2d3ad70cfcad497f6cca
font_02_sfnt_off00012d09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D09 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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