Malicious PDF — malware analysis report

Static analysis result for SHA-256 d58b1fa32141f9e6…

MALICIOUS

PDF

75.2 KB Created: 2021-04-29 06:57:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 9d2aabb5c54edfe4b4cb5f94d6c79a42 SHA-1: 5400c4176beb333bdfd0b707bf4a68b9295b05ae SHA-256: d58b1fa32141f9e6336d5fcaa3d1bb8ebdf70d28c611fb05bb65660e21a2b3ab
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to disposable hosting domains and are structured as link farms, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body, though heavily obfuscated, contains references to 'Sea of monsters movie download in tamil', suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://golowaki.ru/strik?utm_term=sea+of+monsters+movie+download+in+tamil PDF link annotation
    • http://dejepuzalew.mygamesonline.org/digupagumepofotiwog.pdfIn PDF document text
    • http://pevazaw.mypressonline.com/mesotelioma_pericardico.pdfIn PDF document text
    • https://giretalude.weebly.com/uploads/1/3/4/6/134677333/2098549.pdfIn PDF document text
    • http://beliyden.xyz/1961089372886cli.pdfIn PDF document text
    • https://zifokodogip.weebly.com/uploads/1/3/1/3/131398222/xakijelone.pdfIn PDF document text
    • http://anstel.pro/64450032701xgx86.pdfIn PDF document text
    • http://lenudes.com/89480285958oj0z8.pdfIn PDF document text
    • http://fisujerekuvij.getenjoyment.net/pebijoru.pdfIn PDF document text
    • http://lami-lashes.site/calvin_and_hobbes_quotes_about_growing_uptwu0b.pdfIn PDF document text
    • https://jumifusat.weebly.com/uploads/1/3/4/6/134629025/3a265efd560569.pdfIn PDF document text
    • http://alcexpress1.xyz/floaroma_town_sheet_music7nhal.pdfIn PDF document text
    • http://lamaded.mywebcommunity.org/jipoxiga.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://wezikadedikenev.epizy.com/adding_and_subtracting_negative_numbers_worksheet.pdfIn PDF document text
    • https://68f06c25-eb64-4e0a-94e3-a0e33e610147.filesusr.com/ugd/463ace_a187fda774374c698d975f5d7817adcd.pdf?index=trueIn PDF document text
    • http://wufikemofumop.atwebpages.com/moto_g6_plus_wallet_case.pdfIn PDF document text
    • http://juxuvirorut.epizy.com/gefoje.pdfIn PDF document text
    • http://mojilobopage.rf.gd/1251053040.pdfIn PDF document text
    • http://kirorewomomi.rf.gd/additional_mathematics_for_west_africa_free_download.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e826.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE826 5308 bytes
SHA-256: d4c4e831b19266c2c54647958e55b0db2c83213f0f3b11675a4f34688882f9bc
font_01_sfnt_off0000fa34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA34 10956 bytes
SHA-256: 8f5c6ef9caf76294c355732e73f61b891f0410761ee3d2eeece2fea5ed038fc3

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