Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cc78c100cbd3098…

MALICIOUS

PDF

83.7 KB Created: 2021-03-04 07:14:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: 8be1b7e77f689819d79fe9b89b083a26 SHA-1: 84230adbe1fed015bc91a81ab38d6f12988753bd SHA-256: 5cc78c100cbd30981b88626441b9a2126470b0b46eca0ea862a8c47df7942ce0
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs pointing to disposable domains and link farms, a common tactic for phishing or distributing further malware. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://bologen.ru/strik?utm_term=how+to+write+solution+set+in+interval+notation PDF link annotation
    • https://mejekuveko.weebly.com/uploads/1/3/5/3/135392268/vimija.pdfIn PDF document text
    • https://lakubamovoto.weebly.com/uploads/1/3/0/7/130776542/bidelotobuw.pdfIn PDF document text
    • http://nuguzofa.iblogger.org/communist_manifesto_book_online.pdfIn PDF document text
    • https://genunilime.weebly.com/uploads/1/3/4/3/134344847/kazevemigo.pdfIn PDF document text
    • http://thrivewebs.com/lasuwirejimigibotubiwamut4rpc.pdfIn PDF document text
    • http://creditactive.info/gobelutulageqc7e6.pdfIn PDF document text
    • https://pebevakulowuju.weebly.com/uploads/1/3/5/3/135323022/74e3d9.pdfIn PDF document text
    • http://sazaleve.22web.org/74395766374.pdfIn PDF document text
    • http://didazema.mypressonline.com/what_does_crescent_moon_and_star_mean_in_islam.pdfIn PDF document text
    • http://fupemagis.mywebcommunity.org/69436233667.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369332/normal_5fd7f427d5a7c.pdfIn PDF document text
    • http://mosomupusafebin.medianewsonline.com/org_chart_template_download_free.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446162/normal_6010f64c50885.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://padegijogul.atwebpages.com/89776148604.pdfIn PDF document text
    • http://sibomag.epizy.com/wunawo.pdfIn PDF document text
    • http://vorisenunajix.myartsonline.com/8386863526.pdfIn PDF document text
    • https://s3.amazonaws.com/bezutu/home_alone_full_movie_hd.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://scripts.sil.org/OFLIn 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_off0000f241.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF241 4792 bytes
SHA-256: 66fd427361764f4b89ce0caa6ededf24d2511530ad435f9fc6c9bd550ac069d9
font_01_sfnt_off000102ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x102AD 12084 bytes
SHA-256: 198855055f2239990dfeccdf4f8f3f5ec5444083c792bd124b1fdddc4cd99f92
font_02_sfnt_off00012a39.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A39 16444 bytes
SHA-256: c592b5c9e556c7eecae35134f0910e6554f2fc24fdb16b6ac1133d8a2e92722b

Open this report in the interactive analyzer, or submit your own file for analysis.