Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e3dd8cffbf64535…

MALICIOUS

PDF

89.2 KB Created: 2021-07-03 14:14:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: ef36fed41cacdf12ee17f596474f8811 SHA-1: 6a7f3fd38e672570a07ad17be1431fbe928544cf SHA-256: 2e3dd8cffbf645354ecd7cebc363c8ee78b7cb9ce6e35d15419e1dbf1b7bbce2
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It functions as a link farm, containing numerous URLs pointing to compromised websites, likely to lure users into clicking and potentially downloading further malicious content or submitting sensitive information. The presence of multiple distinct hosts and the use of 'utm_term' parameters suggest an effort to obscure the true malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9924

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 http://swadeministries.com/pastor-sammy/upload/imagecontent/file/bilotinete.pdf In PDF document text
    • http://lawcab.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160a6e69fb66b6---fazorewezirosamubibu.pdfIn PDF document text
    • http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606c778bcd07c---81033093844.pdfIn PDF document text
    • http://www.contectrade.hu/fckfiles/file/27066867131.pdfIn PDF document text
    • https://cafemocion.com/userfiles/file/4143445276.pdfIn PDF document text
    • http://drukarnia-warszawa.pl/pliki/file/forizasogofolaro.pdfIn PDF document text
    • https://andrejc.si/files/file/juvusaxebalovog.pdfIn PDF document text
    • http://www.anclupnapoli.it/userfiles/file/zowebaxozijiwafadebilar.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/9ba38a4255fe0be5695bc5b7b6af0702/tigapisojugu.pdfIn PDF document text
    • https://cualuoihoanmy.com/uploads/userfiles/file/53811181941.pdfIn PDF document text
    • http://technoculture.cz/admin/upload/file/rutilufopip.pdfIn PDF document text
    • http://kppzp.pl/userfiles/file/30028511752.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/ccd63810f2d062a4c3d3a957cd31dd83/dobawimujavabuzuwodunevix.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5b9de067ac---25569705444.pdfIn PDF document text
    • https://satybharat.com/ci/userfiles/files/pigelizuvi.pdfIn PDF document text
    • https://ccaquebec.com/userupload/files/pufipozosibolup.pdfIn PDF document text
    • https://www.landalastadservice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0d7596236e---digatuvafanukovi.pdfIn PDF document text
    • http://www.carolglassman.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608fa70d0bb42---37445597277.pdfIn PDF document text
    • http://silmalogistics.com/sitename/app/webroot/uploads/ckuploads/files/2279623606.pdfIn PDF document text
    • http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16079179107f0f---jivisolipepukofet.pdfIn PDF document text
    • http://www.webtony.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a92ad07f783---7961345315.pdfIn PDF document text
    • https://leosservices.com/userfiles/file/12367100704.pdfIn PDF document text
    • https://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/160aa35eedf7d8---30633547686.pdfIn PDF document text
    • http://www.magicapro.it/wp-content/plugins/formcraft/file-upload/server/content/files/16079424aaca1b---bulakafanapufagigazalo.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=a+muster+ofPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ef93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF93 10052 bytes
SHA-256: 5902db4af11ca664451375d253feaf827179ee93fb8fd32c8f14aaad32505b38
font_02_sfnt_off000105ff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105FF 7756 bytes
SHA-256: 040a6a4207d8df92a2cc9f37545b66b8e856d47b48364209714d631749331b75
font_03_sfnt_off0001201f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201F 24912 bytes
SHA-256: 4ac48023b3ddc047bebe050655a381b97e6cf98908d92b243771847d84ba1e88

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