Malicious PDF — malware analysis report

Static analysis result for SHA-256 284eca934fd737d7…

MALICIOUS

PDF

92.7 KB Created: 2021-08-06 22:57:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1147e8fe3fdaa620eacac56e1ba05e1f SHA-1: d09d2f24ce5b80727f4ac349a34c9fc07283b61c SHA-256: 284eca934fd737d76a14233ac7d1302c70e3d8e3c2bfa61b4a643be77d82eeaf
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs pointing to various domains, many of which appear to be compromised WordPress sites or disposable hosting. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a non-clustered link farm on disposable hosting, and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggests links to compromised CMS upload storage. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution through these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9932

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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://pixomot.ru/uplcv?utm_term=nashibwan+marathi+movie+2019+online+watch PDF link annotation
    • http://lctrading-gmbh.com/ckfinder/userfiles/files/73771180429.pdfIn PDF document text
    • https://wilsonbarrera.com/inicio/wp-content/plugins/formcraft/file-upload/server/content/files/160983c6717281---vawuvexibotasijarep.pdfIn PDF document text
    • https://eledigitalpr.it/allegati/file/10140563910.pdfIn PDF document text
    • https://baileyelectrical.services/wp-content/plugins/super-forms/uploads/php/files/nao7u565il6mib2b9tk0rgk4pg/nalixazewizalajok.pdfIn PDF document text
    • http://montpellier-businessplan.fr/mbp/upload/images/images/upload/ckfinder/63192862636.pdfIn PDF document text
    • https://area5srl.it/file/vawagavofiwewumezorone.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608915a9bd6c5---porosanata.pdfIn PDF document text
    • http://ghrnightinwhite.com/clients/7/72/721f26fb9237119891afe8d29dbdfc29/File/pubesenolevalijitonuxas.pdfIn PDF document text
    • https://bselink.com/userfiles/file/lenasudozebovubolifij.pdfIn PDF document text
    • http://www.thelawchamber.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ec5124d49f6---nalojom.pdfIn PDF document text
    • http://porpora.info/imagenes/imagenes_contenidos///fenepotemokumog.pdfIn PDF document text
    • https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/is6iv4g03onumrdr5apcgner7m/zigesipojuf.pdfIn PDF document text
    • https://pasarangroup2.com/contents//files/74586539094.pdfIn PDF document text
    • http://ehomeforeclosure.org/images/file/3364896190.pdfIn PDF document text
    • https://dacoma.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160aa637428a49---fukomeruwi.pdfIn PDF document text
    • http://elskenecologie.nl/files/gapazutap.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/994c4c01972ca67500cb436e08ae9f9c/14771055552.pdfIn PDF document text
    • http://texinpack.com/uploadfile/file///2021080308464365.pdfIn PDF document text
    • https://frasertechno.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082dfc34dbb8---xajoruzinezirawojomulutu.pdfIn PDF document text
    • http://daiichihr.com/uploads/news_file/tiwudozolog.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/160a9508b908f6---48113087182.pdfIn PDF document text
    • https://eclipsetheaters.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bce7321cf13---7386283418.pdfIn PDF document text
    • http://smartcookieacademy.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e4f9e55daa1---zevurixewa.pdfIn PDF document text
    • http://140.121.125.49/ckfinder/userfiles/files/20210713_062206.pdfPDF link annotation
    • http://chanakyaaerospacedefence.com/userfiles/file/rubifejutegatikotifetur.pdfIn PDF document text
    • http://driver-jazda.pl/upload/file/40450723871.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_off000103fa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x103FA 16968 bytes
SHA-256: edbac393852b3792b088d182f1ee43e3d1b4c69ddadd87ffd82029ea8d5b9df5
font_01_sfnt_off00013015.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13015 11228 bytes
SHA-256: a9754296bb687a15c8c39b61a9f1d15e5e7feaaa369868ad5b4c48a37621f3dc
font_02_sfnt_off00014a58.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14A58 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1