Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb4fc98bd4d5891b…

MALICIOUS

PDF

84.1 KB Created: 2021-09-04 09:25:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 0277e42291e5fd9647cfa12bd54cbcbe SHA-1: e6eda1ed934cc927750ec3fb261a72d5baeb7485 SHA-256: fb4fc98bd4d5891b162d3d3e58ccbea0caebb933af659bb2be236d745e738faf
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' heuristics indicate a pattern of using these sites to host or link to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9944

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://ketchas.ru/uplcv?utm_term=bank+alfalah+islamic+branch+codes+pdf PDF link annotation
    • https://alzubidi.com/userfiles/files/6581750517.pdfIn PDF document text
    • http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ae8062173dd---badesapimefufemejixerufug.pdfIn PDF document text
    • https://associazionedynamica.it/uploads/file/65501870388.pdfIn PDF document text
    • https://tvmreza.tv/ckfinder/userfiles/files/69169208534.pdfIn PDF document text
    • https://windfreeklima.com/upload/ckfinder/files/63529477173.pdfIn PDF document text
    • https://pierreseche.fr/userfiles/file/vapewewigiriwusoxabituv.pdfIn PDF document text
    • http://purofirstli.com/userfiles/files/fumimovutov.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/776a47ad9b32a9125c495c7aa6261196/64834476332.pdfIn PDF document text
    • http://plncse.hu/php_data/file/giboveketomumabun.pdfIn PDF document text
    • http://thaimassagemodel.com/ckfinder/userfiles/files/27474023195.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0407a98daf---66727066367.pdfIn PDF document text
    • https://amursvoidom.ru/media/files/tixifixerazeviruzesu.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1b7b4bfe4---47360990272.pdfIn PDF document text
    • http://plenaadoracao.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a87aca38b9e---gonudinemobojef.pdfIn PDF document text
    • https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/oc0er6cft1ah9ehf2nbtgg5r76/zirezozijik.pdfIn PDF document text
    • https://www.darrellstuckey.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c9ad9978fb5---49517623202.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b3160d2631c---65186925004.pdfIn PDF document text
    • http://skrabl.pl/www/rpbd/fck/file/kokepofogasefevutaxebut.pdfIn PDF document text
    • http://xn--h49al33a2zdp0eo1x.com/DATA/file/20210723064710.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/16107ba1e432b5---muvewi.pdfIn PDF document text
    • http://objetivovender.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ce8221c111---bojisasederuni.pdfIn PDF document text
    • http://ljhalls.com/wp-content/plugins/super-forms/uploads/php/files/8b8f5b0ee00d0c0ed5d0fed58cbca786/62480652936.pdfIn PDF document text
    • https://cihangirhotel.com/upload/ckfinder/files/2598748571.pdfIn PDF document text
    • https://janeunchained.com/wp-content/plugins/super-forms/uploads/php/files/gmmd3f68pcdkjnkc51ifndqp1j/84891769953.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000e248.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0xE248 17928 bytes
SHA-256: 33b94811762f328f887031e0fe1b80266e38beabdd11eb6e80c351dc0c451cbe
font_00_sfnt_off0000c8f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F3 11072 bytes
SHA-256: c1be86a275ffb7457de297edeae4b24072af42186d982af09ac2828d17477cc0
font_02_sfnt_off0000fe38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE38 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off0001164a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1164A 17000 bytes
SHA-256: 8321b1a572a6e6b3ec2e4ac0bab91a8f8b3e71359a0077c18f23534b6956f3f7

Open this report in the interactive analyzer, or submit your own file for analysis.