Malicious PDF — malware analysis report

Static analysis result for SHA-256 30d439bbc9097504…

MALICIOUS

PDF

78.6 KB Created: 2021-03-30 22:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: cc625a766c22017112c7155c5b86ddef SHA-1: 96bb0162dd69e5a07abd722a49993f0ad52747de SHA-256: 30d439bbc909750437ad8a10fedac701e065f148cd3f5c6e8abf489a2807476f
134 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. It uses an urgency-based lure. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://vilenefex.ru/123?utm_term=croup+guidelines+australia PDF link annotation
    • https://cdn.sqhk.co/xedasuzefer/zXjNhhX/lep_s_world_3_download_free_for_pc.pdfIn PDF document text
    • https://cdn.sqhk.co/rifomemi/cheggeu/82359263456.pdfIn PDF document text
    • http://zijixiteluwek.scienceontheweb.net/wheat_flour_production_process.pdfIn PDF document text
    • http://jomikifu.medianewsonline.com/affiliate_marketing_guide.pdfIn PDF document text
    • http://viteroludobano.mypressonline.com/xikimatarukipejirozizuv.pdfIn PDF document text
    • https://cdn.sqhk.co/wovupeni/Gidhj5y/85669234959.pdfIn PDF document text
    • http://bometaximom.scienceontheweb.net/71254502533.pdfIn PDF document text
    • http://vuvajujuli.mygamesonline.org/concepts_of_database_management_9th_edition.pdfIn PDF document text
    • https://cdn.sqhk.co/zolilobup/Phjied5/65254611300.pdfIn PDF document text
    • https://cdn.sqhk.co/bemememu/hekhhie/dead_effect_2_apk_highly_compressed.pdfIn PDF document text
    • http://zaxiluxedexu.getenjoyment.net/jekikugomajavexiwarak.pdfIn PDF document text
    • https://cdn.sqhk.co/gagunewatevo/b5ihigH/c._a._t_officers_uniform.pdfIn PDF document text
    • https://cdn.sqhk.co/zotofoza/mejcHAR/30098228007.pdfIn PDF document text
    • http://zitupow.medianewsonline.com/analise_swot_artigos.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xixitokap.rf.gd/sunbeam_heated_mattress_pad_twin_size.pdfIn PDF document text
    • http://jaxunukologefis.onlinewebshop.net/92205252300.pdfIn PDF document text
    • http://joriboka.epizy.com/asleep_custom_map_minecraft.pdfIn PDF document text
    • http://wosolebaxuwutux.rf.gd/62231647297.pdfIn PDF document text
    • http://zumoxevozasumek.epizy.com/vorewabaguv.pdfIn PDF document text
    • http://sagoralezerelo.onlinewebshop.net/warhammer_40k_8th_edition_detachment_roster.pdfIn PDF document text
    • http://mupegutiwigo.epizy.com/vanilla_wow_cooking_guide_horde.pdfIn PDF document text
    • http://domuromu.atwebpages.com/44300980458.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f669.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF669 5032 bytes
SHA-256: 924a8e92557d38c9accb3f3fba1233214874418ee6dcefec2586836ca37e7977
font_01_sfnt_off00010795.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10795 11016 bytes
SHA-256: 597a5274a4403e8d9b3b674355e19831ef2386ad0232732cafb91b520a185383

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