Malicious PDF — malware analysis report

Static analysis result for SHA-256 078cbf9145662745…

MALICIOUS

PDF

101.5 KB Created: 2021-03-29 13:29:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-13
MD5: 8e86ac2d1c2c0578ef2f223ef56cdecd SHA-1: a273f1bf6c2ac77bff4eadb69047cc14161c75f9 SHA-256: 078cbf9145662745a811cab71cf5be5a3f5fd25cce1ed4bd96ba6653b98e6a2b
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a link farm with numerous external URLs, suggesting a phishing or SEO poisoning campaign. The primary URL, https://mezovuduw.ru/wix?keyword=wim+hof+pdf+espa%25C3%25B1ol+gratis, is likely part of this lure. No scripts were extracted, but the PDF structure itself facilitates redirection to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://mezovuduw.ru/wix?keyword=wim+hof+pdf+espa%25C3%25B1ol+gratis PDF link annotation
    • https://cdn.sqhk.co/pomijatan/N6kqOjj/96905621802.pdfIn PDF document text
    • https://kapupidaxor.weebly.com/uploads/1/3/5/3/135386814/xabazu-guguzakumetug-bikidafiritido.pdfIn PDF document text
    • http://cmbespaceclient.xyz/which_stihl_backpack_blower_is_bestm55mh.pdfIn PDF document text
    • http://xotizel.iblogger.org/jquery_accordion_examples_free.pdfIn PDF document text
    • https://cdn.sqhk.co/mitejapeki/UignUMk/business_analyst_resume_skills_list.pdfIn PDF document text
    • https://cdn.sqhk.co/remimidotomi/iZgchgg/87803106227.pdfIn PDF document text
    • http://walletelectrum.buzz/66273279519bijx8.pdfIn PDF document text
    • https://badoxilorapa.weebly.com/uploads/1/3/5/3/135347885/8988601.pdfIn PDF document text
    • https://cdn.sqhk.co/dogatefi/highcid/89073500183.pdfIn PDF document text
    • https://cdn.sqhk.co/xibetevoxaj/gdm3nQY/82831011147.pdfIn PDF document text
    • https://vaxatimiroxak.weebly.com/uploads/1/3/4/6/134617636/1574168.pdfIn PDF document text
    • http://wonder-ita.fun/best_smart_bathroom_scales_uk017gl.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d8fc6e7a-b068-4f0a-90e0-ebb3d5eb7626/fe_handbook_10.0.pdfIn PDF document text
    • https://de315c38-daa2-4293-b666-e554ba9b7d65.filesusr.com/ugd/564d2e_f3da4681a8aa4b1f93ac9e26cad793ad.pdf?index=trueIn PDF document text
    • https://bad3f395-1638-4667-b349-d6f934eeab49.filesusr.com/ugd/ed2d23_eac239c0b6564abd9fa583e7089806b2.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/ba1e0c05-46d2-4f72-be27-6f1fdbb8cdcf/65796333338.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ef18cdcf-c3d5-4746-96fa-eebbc8288a36/luvokatezegajororubujuzut.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d51e2350-6c52-4b6d-82b9-6ab3c319262e/network_security_basics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c37fd1fb-c1f9-40c8-a82f-27543fdfa5ff/14884275539.pdfIn PDF document text
    • http://vetanafajodomek.epizy.com/cavs_schedule_2020_18.pdfIn PDF document text
    • http://lonozixugixapap.epizy.com/epic_emr_system_demo.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
    • https://savannah.gnu.org/projects/freefont/In PDF document text
    • http://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013881.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13881 6744 bytes
SHA-256: 127b44c9f93874c96d25eb7ddc4688780d8877ce931cf296363fb5748d8d514b
font_01_sfnt_off00014968.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14968 5680 bytes
SHA-256: db7665c7721ec98c0f1d23b5112bfb2ea271e986a2e0f3de8aa381dffba47247
font_02_sfnt_off00015c5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C5F 12944 bytes
SHA-256: 22b0aa4ac397a2746de5a923e1acbe4c535fc29502748aa5d3b3c56d9affdf45