Malicious PDF — malware analysis report

Static analysis result for SHA-256 e69a6d1990a0de4a…

MALICIOUS

PDF

84.0 KB Created: 2021-10-05 07:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 5197d78e1d1fa3c62ec9742aec44f3bf SHA-1: 14f114047a8c8c7ddea54d519a21a54a72485d76 SHA-256: e69a6d1990a0de4a2916dbe9e883a7aaf4c23b20ad25718518064813c29fad4e
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains embedded JavaScript and numerous external URIs, many of which point to compromised or disposable hosting, suggesting a link farm designed to redirect users to malicious content. The presence of embedded JavaScript indicates an attempt to execute code within the PDF viewer.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://farmandari-sarvestan.ir/images/news/files/26962379693.pdf In PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/31379555128.pdfIn PDF document text
    • https://buonoantonio.it/userfiles/file/66992037918.pdfIn PDF document text
    • https://marcvandewiele.com/userfiles/file/xesove.pdfIn PDF document text
    • http://yourtruck.be/upload/ckeditor/file/pebazufizolumi.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1614c7c5fbfc8a---nuxinamijewiliwuziwi.pdfIn PDF document text
    • https://abrasco.org.br/ckfinder/userfiles/files/15977677203.pdfIn PDF document text
    • http://j1medical.com/uploaded/file/3693249023.pdfIn PDF document text
    • https://www.bountyvacation.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612ed73ff0a77---kuvemotoborupapid.pdfIn PDF document text
    • http://ph-easycome.com/userfiles/file/72302712775.pdfIn PDF document text
    • https://lotteppta.com/beta/assets/file/mawitodetazakisavakanus.pdfIn PDF document text
    • https://gberwanda.com/gbe/useruploads/blogs/files/daviwiborirolaxevuwi.pdfIn PDF document text
    • http://neoneophytou.com/ckfinder/userfiles/files/xunasolaxexoludale.pdfIn PDF document text
    • http://davobio.com/upload/files/fijuzusorumuxojogeligob.pdfIn PDF document text
    • https://konchris.com/userfiles/file/1631174078.pdfIn PDF document text
    • http://badischer-kunstverein.de/ckfinder/userfiles/files/vavosaxafi.pdfIn PDF document text
    • http://vandervalk.reviews/app/webroot/files/userfiles/files/12539930823.pdfIn PDF document text
    • http://veszpremkosar.hu/_user/file/femuv.pdfIn PDF document text
    • http://cuborh.com/natelinhanew/js/ckfinder/userfiles/files/laxawemevumadoxadipek.pdfIn PDF document text
    • http://elliptical-trainers.ru/ckfinder/userfiles/files/talusepuzifok.pdfIn PDF document text
    • https://adtw1.com/ckfinder/userfiles/files/62757264057.pdfIn PDF document text
    • https://eslms.com/userfiles/file/48903571314.pdfIn PDF document text
    • https://milliondollardesiclub.com/upload_files/featured/files/20875239937.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/32cc9dd9015e97661ea9da52d971294d/71073192684.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/zMnd8XtcwSM/uplcv?utm_term=sizwe+bansi+is+dead+by+athol+fugardPDF 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_off0000e21c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE21C 11208 bytes
SHA-256: c55a94390afc0ecb3aa8f1019c0755661c52bea259c83640aa72d7c9b9ae6b2c
font_01_sfnt_off0000fc32.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC32 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011444.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11444 17696 bytes
SHA-256: a51cd970a452e16774cc527e8957830b806b95b7698422ca869f3e472308e314

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