Malicious PDF — malware analysis report

Static analysis result for SHA-256 029294636776ad3a…

MALICIOUS

PDF

80.0 KB Created: 2021-10-11 19:17:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 53ef87e8b1e1470d9a7d8850b033e4ee SHA-1: 8f4ec0997b89bec7e4d3a5cfdd95856193a0cd39 SHA-256: 029294636776ad3a10658660887d33ed3a462523419c9f7df28503be6f9a985f
204 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains embedded JavaScript and numerous links pointing to external resources, many of which are hosted on compromised WordPress sites or disposable domains. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to trick the user into downloading a secondary payload. The presence of PDF_RANDOM_URL_LINK and PDF_SEO_DISPOSABLE_LINK_FARM heuristics further supports the attack pattern of using link farms for malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 8

  • 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 to algorithmically-generated URL high PDF_RANDOM_URL_LINK
    PDF contains a clickable HTTP(S) link whose host looks algorithmically generated (pronounceable-random labels) and whose path/query carries a long high-entropy token. This is the randomized-redirector pattern of malspam phishing lures — the visible document is only a prompt — not a PDF parser vulnerability.
  • 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://huntic.ru/uplcv?utm_term=st+es+youngstown PDF link annotation
    • http://solar-makernavi.com/ckfinder/userfiles/files/74273009660.pdfIn PDF document text
    • https://www.alitec.es/js/ckfinder/userfiles/files/551114679.pdfIn PDF document text
    • http://sumtinathholidays.com/admin/uploadfiles/file/vikixilivok.pdfIn PDF document text
    • https://clumba-indoor.ru/files/files/31444164389.pdfIn PDF document text
    • http://pro-group.ru/userfiles/file/28044273581.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1615a049c850c7---65087795196.pdfIn PDF document text
    • http://workontext.ru/media/file/muruxopalufomekolojide.pdfIn PDF document text
    • http://worldtrip-eng.total-flame.com/application/views/blog/userfiles/file/mugenominetupemuwajidos.pdfIn PDF document text
    • https://zlataraburmevuckovic.com/files/xorepasizuduvuved.pdfIn PDF document text
    • https://transcendenceit.com/wp-content/plugins/super-forms/uploads/php/files/568b4860e670ea14dd25a9ebf7434fa2/rosonekulomedawezaka.pdfIn PDF document text
    • https://felixtrail.com/imagini_ws/84523904536.pdfIn PDF document text
    • http://anthonyjcincottalaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/vedisatatavu.pdfIn PDF document text
    • http://rimini-portal.de/bilderarchiv/file/navonotazemu.pdfIn PDF document text
    • https://growlocals.com/wp-content/plugins/super-forms/uploads/php/files/09d736d81a36cfafa205ec8c5c85017c/91866522335.pdfIn PDF document text
    • https://www.tctnanotech.com/wp-content/plugins/super-forms/uploads/php/files/220c3cbc6c82ff58d0ca76e95da76100/derenirukox.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16130ca89bce40---1879191497.pdfIn PDF document text
    • http://sahcarpets.com/userfiles/file/15937300955.pdfIn PDF document text
    • https://kitchensofdiablo.com/upload/file/93110685836.pdfIn PDF document text
    • https://superiorservicesandsolutionsfl.com/nbloom/fckuploads/file/xebututerifuzuxuzu.pdfIn PDF document text
    • http://cosmikkino.ru/sadm_files/xalozezetekirimalamu.pdfIn PDF document text
    • http://scsychem.com/upload/files/jivezeluxi.pdfIn PDF document text
    • https://asiantms.com/ckfinder/userfiles/files/mevazepedumibokuzive.pdfIn PDF document text
    • http://gojjang.com/uploads/files/wukagegebukazabot.pdfIn PDF document text
    • https://www.channeloflove.com/ckfinder/userfiles/files/tatekesu.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_off0000d2ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD2EA 18932 bytes
SHA-256: e320de571d52f8ae878f3d906b4a40f9da715da2bde3b201b2f0e2e61b0d8a41
font_01_sfnt_off0001034d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1034D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011b64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B64 10260 bytes
SHA-256: 947cb96940c392650e7970586458cf206bc074ea2686922ceb20ab4721131a21

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