Malicious PDF — malware analysis report

Static analysis result for SHA-256 41e1db194c820139…

MALICIOUS

PDF

81.7 KB Created: 2021-09-19 22:52:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: d5087362056b9bafbc63c6e3fbde593d SHA-1: 12b47e478a4f7e71385883e1b2521044f1dc8db8 SHA-256: 41e1db194c8201396bdde6bc9e5c2c72d38a8fb9e13d1f3d955a91d727253338
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous links to external websites, many of which are hosted on compromised or disposable domains. The presence of embedded JavaScript suggests an attempt to execute malicious code, likely to download further payloads or redirect the user to phishing sites. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly indicates a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://crysiq.ru/uplcv?utm_term=wifi+explorer+pro+apk PDF link annotation
    • http://cesishotel.com/res/wysiwyg/file/venirilu.pdfIn PDF document text
    • http://hindel-relax.ch/ckfinder/userfiles/files/nukajezoga.pdfIn PDF document text
    • http://autosoftware.company/autoresponders_images/files/99613641380.pdfIn PDF document text
    • https://tahuacoop.com/cms_gpadmin2015/sgi_userfiles/userfiles/files/14387337382.pdfIn PDF document text
    • https://apelhijau.com/contents/files/tufufovaxetakusap.pdfIn PDF document text
    • https://aslplastic.com/ckfinder/userfiles/files/sebadujivubefom.pdfIn PDF document text
    • https://sakkestadbil.no/userfiles/file/7322329052.pdfIn PDF document text
    • http://docando.es/js/ckfinder/userfiles/files/26426296080.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/6978e2d716637668f0ef71347d155fec/47754857075.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/fawudatoxojexenubogozugaz.pdfIn PDF document text
    • http://hueide.com/upload/files/82771861971.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612eb1d5bf063---zomosetewu.pdfIn PDF document text
    • https://aquariumfargo.com/wp-content/plugins/super-forms/uploads/php/files/c56c8ab7e03dd7fdfe3d63f76ff5b437/30319835223.pdfIn PDF document text
    • http://moscreen.in/cmsfiles/file/45412795063.pdfIn PDF document text
    • http://xn--h1aaebajlcgx.xn--p1ai/sadm_files/xajinotivofanazozur.pdfIn PDF document text
    • https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140871c52f43---bokegisamunugereputez.pdfIn PDF document text
    • http://dcbestwings.com/uploads/files/mugorumiribumo.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/46476497969.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/8475aea2a71f8479f6c5bf0e5ed726a8/riledaf.pdfIn PDF document text
    • https://luxesystem.site/js/ckfinder/userfiles/files/27456177440.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/09/13/file/20210913_060714_196.pdfIn PDF document text
    • http://szyqjsj.com/UploadFile/file/20210908095447416.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_off0000d957.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD957 18500 bytes
SHA-256: c8027871fd410ec3f2d777231b1ba91261ee51d77011f4d4b2ad957c88175ee6
font_01_sfnt_off00010a40.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A40 10168 bytes
SHA-256: dcef6becf8913771c8ebc9c50fdc53c010df56b3616baffb1b8f5832019cec2e
font_02_sfnt_off0001211f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1211F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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