Malicious PDF — malware analysis report

Static analysis result for SHA-256 30e893538e7d3cf9…

MALICIOUS

PDF

84.6 KB Created: 2021-09-07 04:13:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 1427be507dfa703dfca015eb3630d860 SHA-1: f520b7b1617559f5e3e75358b273a67122f68fe8 SHA-256: 30e893538e7d3cf9f59deba583b78ea8620b962abf5039b8e6622f3a10e51eaf
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a high-confidence ML classifier and ClamAV detection. It contains a link farm pointing to numerous distinct hosts, many of which appear to be compromised CMS uploads or disposable hosting. The primary purpose seems to be redirecting users through a series of links, likely to a phishing page or a malware download site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://roweryelectra.pl/app/webroot/uploads/file/16258148851682.pdf In PDF document text
    • https://alusol-kw.com/ckfinder/userfiles/files/lefavonorasagakon.pdfIn PDF document text
    • http://musicandyouapp.com/webupload/editorimg/files/libevuni.pdfIn PDF document text
    • https://www.thaiahpa.com/flash/files/70898750522.pdfIn PDF document text
    • http://www.uppld.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c8cc240051d---60909427627.pdfIn PDF document text
    • http://www.nuricomuvakfi.org/wp-content/plugins/super-forms/uploads/php/files/18k9gu6amve9koqq58hiq6f5o2/saxotet.pdfIn PDF document text
    • https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/4f3ede852900aaba4903a4afea55e8e1/fegigofarulupidet.pdfIn PDF document text
    • https://fresh-cherries.com/ckfinder/userfiles/files/sotazozo.pdfIn PDF document text
    • http://saigonford3s.com/uploads/2021-07-09/images/files/xesorumojezuj.pdfIn PDF document text
    • https://whiteelephant.co.in/wp-content/plugins/super-forms/uploads/php/files/47f89f9dd78ce2d832c17a106b55b511/13890307648.pdfIn PDF document text
    • https://vnjhanoi.com/upload/files/xorij.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160746a7072d55---bubupodosorekilagofuz.pdfIn PDF document text
    • https://bczenekar.hu/files/file/supexofopisifixunigilivep.pdfIn PDF document text
    • http://marsalanoleggio.it/userfiles/files/80907545693.pdfIn PDF document text
    • https://forumhrdbekasi.com/webroot/userfiles/files/70946798366.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/55650029314.pdfIn PDF document text
    • http://lamachine.nl/userfiles/file/likowajox.pdfIn PDF document text
    • http://synergyproperty.com/images/files/worolazawigososulixitiw.pdfIn PDF document text
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f21a8bef738---sotapodatabe.pdfIn PDF document text
    • https://full-flavors.com/img/Data/file/89350195008.pdfIn PDF document text
    • http://dmn.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160877c5fa3fb5---xuvelaxibubofi.pdfIn PDF document text
    • https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607c500655d47---vufomomidobibak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1xuhb7AK25c/uplcv?utm_term=philip+reeve+a+darkling+plain+pdfPDF 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_off0000e6f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F8 10552 bytes
SHA-256: e95866c4235a71da613dd0debac9f3db6401169ce3a79e71bb3898f49d87b249
font_01_sfnt_off0000feb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000116c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x116C8 17968 bytes
SHA-256: 1795266de1dddb091c9fe6b54a0ffdc1ca5f4cbac937237fee6125fee50fffed

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