Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b047455f5209a6…

MALICIOUS

PDF

63.5 KB Created: 2021-06-24 02:10:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: ef990cf1550b3b963ed86c3b666496e9 SHA-1: 6e9878900e4047874190cdb70d355a47ab9a8776 SHA-256: 78b047455f5209a67ab6ded43cca2dd220de734a9df723058b13e302892e9e93
164 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting a link farm or phishing lure. The presence of 'urgency' language further supports a phishing or social engineering attack. While no scripts were explicitly extracted, the nature of the heuristics and URLs strongly suggests the PDF is designed to redirect users to malicious content or download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://crewmak.ru/uplcv?utm_term=ecology+by+pd+sharma+pdf PDF link annotation
    • http://alexlunacoach.com/img/editor/file/22787564118.pdfIn PDF document text
    • https://b2cexpressdemo.com/userfiles/file/zadefekozeleralonap.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/6182b9a569a844b412385f2ce671337d/84643363356.pdfIn PDF document text
    • https://cald-lighting.com/wp-content/plugins/super-forms/uploads/php/files/8fd016054a397823681e5b705733a741/72020151581.pdfIn PDF document text
    • http://marty-triple-m.ch/inhalt/files/66027194588.pdfIn PDF document text
    • https://baconbites.com/wp-content/plugins/super-forms/uploads/php/files/e6ih46furb021hsb53d4pkfpp7/37122611590.pdfIn PDF document text
    • http://vtracauto.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8694c02714---jiragujakofi.pdfIn PDF document text
    • http://agiteam.org/clients/b/b0/b0c4817036ef1cb73596cc935f3fa86d/File/lajofik.pdfIn PDF document text
    • https://adlinefor.com/home/webagen/public_html/korn/data/file/vibifirazixeg.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160b3f28eb3cdf---kirazosupumewuxona.pdfIn PDF document text
    • https://weblative.com/wp-content/plugins/super-forms/uploads/php/files/irgv76f5tcu9vc4u9oanpjj7rn/jilurajarivugibojifu.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/12fa1da4e4ee880d0d9bad19e9888712/basanazopij.pdfIn PDF document text
    • http://magnachip.cn/userfiles/file/20210524104648.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/147dfad8c3d8524cb1468a98990d21e4/2070864048.pdfIn PDF document text
    • https://hmv.ir/wp-content/plugins/formcraft/file-upload/server/content/files/160870a923dbf2---muxib.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ba94.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBA94 5768 bytes
SHA-256: b43f450b297ac8c86d608109d517f40b5aa5e1d38297699bdc1e797a3192c9ef
font_01_sfnt_off0000ce1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE1A 10708 bytes
SHA-256: ac30e2a1004b7c7cc3d19ae39fe44615ce57f18e0139b450a5cf2e35879f8e97