Malicious PDF — malware analysis report

Static analysis result for SHA-256 47d50c1ca32dc0d3…

MALICIOUS

PDF

86.5 KB Created: 2021-08-20 13:06:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 935084c989d85a4f5b10cffd8c32229d SHA-1: 77ea2f0c0b9a41b87593e25b358cbcdf32ca05d3 SHA-256: 47d50c1ca32dc0d3ddde5ac18ae3c923c930f638555e97e639cfb7ab0b32eb17
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links, many of which point to compromised CMS upload storage or disposable hosting, forming a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. The embedded URLs are designed to lure users to external sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9987

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://rajaketiga.com/contents//files/gafibojekad.pdf In PDF document text
    • http://alimentosldm.com/userfiles/file/pojuvaloja.pdfIn PDF document text
    • http://beergolfers.com/blog/images/file/37072598081.pdfIn PDF document text
    • http://autoshiftbid.com/fckeditor/userfiles/file/43057762707.pdfIn PDF document text
    • http://mxagproducts.com/upload/browse/file/jomumosol.pdfIn PDF document text
    • https://grahampropertytax.com/wp-content/plugins/super-forms/uploads/php/files/afc51ad086d15eba515a9391dfc6ce14/vasadisu.pdfIn PDF document text
    • http://ambulatorioveterinariomariani.it/userfiles/files/28928248776.pdfIn PDF document text
    • http://efuegypt.org/userfiles/file/xutulezoruguga.pdfIn PDF document text
    • http://sonkertrail.org/clients/9/92/9260a3c387aed4615f72c72c3a1da295/File/jowatonigewosojirilepos.pdfIn PDF document text
    • http://griswoldremgmt.com/uploads/files/64603345199.pdfIn PDF document text
    • http://ck-kutnahora.cz/gais/image/file/mevudanenenifemowujusa.pdfIn PDF document text
    • https://www.aserspa.net/wp-content/plugins/super-forms/uploads/php/files/c596deb0adm924leb7tpm66il5/fotomijelasiwobenixav.pdfIn PDF document text
    • http://www.cheapmotorcycleinsurancepa.com/wp-content/plugins/super-forms/uploads/php/files/4bbhq7hsl08b6voc0iqcn5rin0/xusapubobiw.pdfIn PDF document text
    • https://bettenbaehren.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611ad32fc0a7a---vefojonorinomonivatuza.pdfIn PDF document text
    • https://hrmconsulting.biz/upload/files/vuretejawobasetese.pdfIn PDF document text
    • http://www.associatedomains.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abe877c347f---61677255883.pdfIn PDF document text
    • http://ventexevent.se/uploads/file/sopuludig.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/76955750703.pdfIn PDF document text
    • https://yssnewlessons.org/UserFilesTwo/file/tewituti.pdfIn PDF document text
    • https://maxim-catering.de/wp-content/plugins/super-forms/uploads/php/files/o8pp3a7t0hp6e9aq4sa48mbc64/4672730899.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/20812162832.pdfIn PDF document text
    • http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/160808bab09e87---puvojuribexezimij.pdfIn PDF document text
    • http://run2endalz.org/clients/2/2b/2b4973775a35d8819257a28a16fdea67/File/takofogumurosa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=how+to+pair+arteck+keyboard+to+ipadPDF link annotation
    • 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_off0000ecbc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECBC 17136 bytes
SHA-256: baf8d3d2e8a1b0ee3f903e0aae52cf5e7fe6129f09d604e7e1869e6e74808a5b
font_01_sfnt_off00011983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11983 10612 bytes
SHA-256: f98cee86b772991b6cb18a5e368dd83401acab1e819771312fa68d2471a2dc07
font_02_sfnt_off000131c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131C0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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