Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea96cb0fc907339a…

MALICIOUS

PDF

68.3 KB Created: 2021-09-26 04:51:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 86b6eca523cbbc84be2eb3f1580dff3c SHA-1: d8e720e89d9330a0fcd1a7d873921000846518ea SHA-256: ea96cb0fc907339afaa95ca3db6b0bdd304ae1c2beb73bb56dcb3a31a2f7f048
176 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file exhibits characteristics of a phishing lure, employing an image-only design with a clickable action to redirect users to external URLs. The presence of numerous links pointing to compromised CMS uploads and disposable hosting suggests an attempt to distribute malicious content or conduct phishing. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a malicious intent, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 68 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/894918c8dc898d43f3b790e1f8ccdb63/35329549847.pdf In PDF document text
    • http://chip-chup.hu/upload/file/tadimimasijaduvakupodefa.pdfIn PDF document text
    • https://mimpidia2.com/contents/files/zamibakufezetujisojidej.pdfIn PDF document text
    • https://teplitsyoptom.ru/wp-content/plugins/super-forms/uploads/php/files/0dd4a1f6290d0231c618bf33435d124f/ritexamixelamedoka.pdfIn PDF document text
    • http://xn--80affcyoc0ac1f6a.xn--p1ai/admin/modules/ckeditor/ckfinder/userfiles/files/zegefudowudipaka.pdfIn PDF document text
    • https://le27.fr/docs/file/loxikebizikojuz.pdfIn PDF document text
    • https://subarini.ro/mm/file/16916963276.pdfIn PDF document text
    • https://cylinder96.ru/admin/ckfinder/userfiles/files/82706094199.pdfIn PDF document text
    • https://candica.pl/ckfinder/userfiles/files/lejimenasatamavoj.pdfIn PDF document text
    • http://yipdeals.com/app/webroot/upload/files/rijowiwagufejidib.pdfIn PDF document text
    • https://libyamonitor.com/sites/all/libraries/ckfinder/userfiles/files/mogiwajugerajutipavi.pdfIn PDF document text
    • https://niboparis.com/upload/fckeditor/file/1632005432_1.pdfIn PDF document text
    • https://g4m3s-4p1-12s1.com/contents/files/wozapuforute.pdfIn PDF document text
    • https://theloneranger.tv/clients/loneranger/ckfinder/userfiles/files/74342856820.pdfIn PDF document text
    • https://rybczewice.pl/userfiles/file/vutij.pdfIn PDF document text
    • http://ppfi-online.com/userfiles/file/96855369977.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/bbbb4bc40f2d13aa824e3b8c0c79eb7f/67569500351.pdfIn PDF document text
    • http://roberlo.cz/www/files/file/punav.pdfIn PDF document text
    • http://manvilastrust-org.bvirani.com/ckfinder/userfiles/files/xomame.pdfIn PDF document text
    • http://www.medicellbank.com/userfiles/files/teredefigutugerixuxamodej.pdfIn PDF document text
    • http://termocity.by/pics/files/jakadebisazimukuvir.pdfIn PDF document text
    • http://svsteinfurth.de/radsportfiles/file/36036855043.pdfIn PDF document text
    • https://wilde-signs.com/media/55220553653.pdfIn PDF document text
    • https://berettyotv.hu/userfiles/files/45962070091.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=gta+v+app+apkPDF 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_off0000b237.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB237 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000ca4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA4D 9680 bytes
SHA-256: c1e06ac51928652732ccfd47f095cc39ad07067501314b779b99c5fb40b6ec86
font_02_sfnt_off0000df86.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF86 14404 bytes
SHA-256: 686d9cd525c532e5a569d4814bc015a2e026f30cb3cc3e41591b9690d96a6c94