Malicious PDF — malware analysis report

Static analysis result for SHA-256 c67e7f31c53821c6…

MALICIOUS

PDF

132.8 KB Created: 2021-03-18 00:34:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3b55009bf0d4f5df83eac013991f8cd6 SHA-1: 81dcd5cbf08a814ac1b8a3c2408c4e596ab7ccbb SHA-256: c67e7f31c53821c6ee6aa64b254a737097be4d341eade734b0c39afbbb8771ca
196 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous external links, with a significant number of them pointing to potentially malicious domains, as indicated by the 'PDF_SEO_LINK_FARM' and 'SE_ADVANCE_FEE_SCAM_LURE' heuristics. The 'ML_NYX_PDF_MALICIOUS' and 'CLAMAV_DETECTION' heuristics further confirm the malicious nature of the file. The document body, though heavily obfuscated, suggests a lure related to legal documents or prizes, consistent with advance-fee scams.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9973

Heuristics 6

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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://soxebez.ru/123?utm_term=enduring+power+of+attorney+tasmania+fact+sheet
    • https://gajaxaja.weebly.com/uploads/1/3/2/7/132712369/sigek.pdf
    • http://ritikutoxukor.22web.org/harry_potter_book_wikia.pdf
    • https://cdn.sqhk.co/potonefamuve/WrjdiiN/xaburunenubogor.pdf
    • https://cdn.sqhk.co/tejilunuf/ifibbtc/33968508536.pdf
    • http://xitemomide.22web.org/what_are_the_6_essential_nutrients_your_body_needs.pdf
    • https://pedasivu.weebly.com/uploads/1/3/5/3/135387907/3222471.pdf
    • https://cdn.sqhk.co/lenawemijixe/hemIjeL/snake_venom_timeline.pdf
    • https://cdn.sqhk.co/bomumuxa/aCm5ghv/motor_sims_2_download_mac_free_full_version.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/divexikav/xepuvakokexulavoputege.pdf
    • https://48e5b1ff-25fb-49a4-826b-3ad3f3a15688.filesusr.com/ugd/0d632a_7904b4f2ad94432caf6da0f119350200.pdf?index=true
    • http://givemuzod.epizy.com/financial_statement_analysis_journal_articles.pdf
    • https://0e9c393c-9feb-4465-ae9d-4486bea7a644.filesusr.com/ugd/4b68be_584d09169b29491aad2509b5c6b0bb90.pdf?index=true
    • https://18b09f4e-de4d-4c1b-9fe6-be55c63b1c00.filesusr.com/ugd/cd81e9_cc2916f5c2964e42919c9579ff3f57be.pdf?index=true
    • https://s3.amazonaws.com/wexoteluwag/minavatiwirewusirelapujas.pdf
    • https://s3.amazonaws.com/xukanomarexumu/fetiniramejuz.pdf
    • https://s3.amazonaws.com/sorogamat/brookes_westshore_uniform.pdf
    • https://s3.amazonaws.com/vobuturinivi/contract_template_microsoft_word.pdf
    • https://s3.amazonaws.com/doxifuba/86628483263.pdf
    • https://s3.amazonaws.com/mojivikapeti/how_to_concrete_mix_design.pdf
    • https://s3.amazonaws.com/lorugipopuxe/50527473837.pdf
    • https://901b9152-9067-49c5-8541-bb90c1a77dfa.filesusr.com/ugd/5d84e8_b6cd3e382d28467aa84a1377991695f5.pdf?index=true
    • https://aa514bbb-a96e-4bc9-8ff3-0ca2edd1104f.filesusr.com/ugd/3fc21f_b711df85bd514c33bff9ad994428f02c.pdf?index=true
    • https://s3.amazonaws.com/lepefi/kafka_metamorphosis_movie.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001cc93.bin
44c2c7aa1c469530e90e458cb2a64a75d27c2f50276d931d8dc55a5985557291		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1CC93 5688 bytes
font_01_sfnt_off0001dfe5.bin
18bd89a3e3ae81abb56672e1cd71b0031767457382f21ac0e2b19ce94c1da809		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1DFE5 10648 bytes

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