Malicious PDF — malware analysis report

Static analysis result for SHA-256 a63642fd176ac5a3…

MALICIOUS

PDF

82.4 KB Created: 2021-07-13 21:27:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 4fafd5fa6fbb227fec9dece75ce3dd4d SHA-1: b431b01a2b389fc19c1fac59f780dc60436e0758 SHA-256: a63642fd176ac5a396e1119899f3fcb3b2efd3977defc12c04265ad3bc366a32
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to compromised WordPress sites, suggesting an attempt to distribute malicious content. The 'SE_PASSWORD_ARCHIVE_LURE' heuristic indicates the document likely instructs the user to download a password-protected archive, a common tactic to bypass gateway security. While no scripts were directly extracted, the PDF structure and URL patterns are consistent with phishing and malware distribution campaigns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9846

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
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/7dcc81e82108f1b2599d6fab4a246c3e/dadusikeripu.pdf In PDF document text
    • http://pnmanagementsolutions.in/uploads/96039978542.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/160bcb4cbc1614---33800348699.pdfIn PDF document text
    • https://www.mds-horizons.com/upload/files/99257957883.pdfIn PDF document text
    • http://www.psstrecno.sk/wp-content/plugins/formcraft/file-upload/server/content/files/160e89ee3a813a---17949092448.pdfIn PDF document text
    • http://wahibluedevils76.com/clients/5/55/55d7338a7abcce318bc847d7f34994f5/File/59157226584.pdfIn PDF document text
    • http://countrysquirefoods.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075a6ed67c7a---gezepopanag.pdfIn PDF document text
    • http://renovator.cz/files/file/gezifoxuzupotiruzuzi.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/61052637312.pdfIn PDF document text
    • http://saikunghouse.hk/userfiles/45534354514.pdfIn PDF document text
    • https://www.azulejositurry.com/wp-content/plugins/super-forms/uploads/php/files/d622j153q6n81imtrmg0ut5jp1/92481271288.pdfIn PDF document text
    • http://elementsgogreen.com/userfiles/file/zetekosaga.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/kosel.pdfIn PDF document text
    • http://fouladsazanco.com/Upload/file/guwabufabili.pdfIn PDF document text
    • http://akkoryazilim.com/userfiles/file/lefakiz.pdfIn PDF document text
    • https://amsteroverseas.com/ckfinder/userfiles/files/21019499476.pdfIn PDF document text
    • https://festival.bg/fckeditorfiles/file/jefilubipetosa.pdfIn PDF document text
    • https://marciasmithconsulting.com/wp-content/plugins/super-forms/uploads/php/files/4a3183f5c14c1b730d2dec0254d04270/rifiwaxapidale.pdfIn PDF document text
    • https://independentmusicleague.com/wp-content/plugins/super-forms/uploads/php/files/7c15d001e4d22aec45680a095189d3ac/18471347688.pdfIn PDF document text
    • https://www.financedeclined.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1608f25cc10485---69099392051.pdfIn PDF document text
    • https://daleel.global/wp-content/plugins/super-forms/uploads/php/files/b5rub0lho5gvh0sr7df6sop7ig/judezasogifolenapubomupo.pdfIn PDF document text
    • http://casaalu.com/luutru/files/62777947397.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/bp5p06fogghlt2g03jcakbs4m9/32122666805.pdfIn PDF document text
    • https://www.sharpeningfactory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b74aa5f178a---topejifis.pdfIn PDF document text
    • http://v-lukomorie.com/uploader/files/43386569622.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160c58cb080b30---nepoxoredujukirok.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=gst+exemption+on+car+for+physically+handicappedPDF 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_off0000dbd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBD5 11140 bytes
SHA-256: 4723f56be7813a1a302d149c2b7993324a4666cadb760080487a14cd0fe71203
font_01_sfnt_off0000f5b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5B5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010dc7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DC7 17600 bytes
SHA-256: 1c79f02b931f5ec578287ee4bd6df40f715a0af8bc4ffd449a205dbf44ff4e60

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