Malicious PDF — malware analysis report

Static analysis result for SHA-256 2488d2e26ee1594a…

MALICIOUS

PDF

83.4 KB Created: 2021-03-15 04:19:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ff0152bb7cc71b78482b3e63c30387c8 SHA-1: 4143b6e430fbbefc3d08e02a40079914ec1da1ca SHA-256: 2488d2e26ee1594a26be56171f1455ed0af6a7ea4dfafd4224eb17ca09dee031
156 Risk Score

Malware Insights

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

The PDF file was flagged by multiple heuristics, including PDF_SEO_LINK_FARM and ML_NYX_PDF_MALICIOUS, indicating a high likelihood of malicious intent. The presence of numerous external links, including one pointing to a suspicious domain (golowaki.ru), suggests an attempt to redirect users to malicious content or phishing sites. ClamAV also detected it as Pdf.Phishing.Trojan.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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 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.
  • 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=how+much+is+maternity+clothing+allowance+navy PDF link annotation
    • http://hookup753.fun/resumen_de_12_cuentos_peregrinos_me_alquilo_para_soar93g1t.pdfIn PDF document text
    • http://gtmedis.com/chemdraw_software_for_mac_freewzl4h.pdfIn PDF document text
    • http://1pokypki.website/79422771389kknki.pdfIn PDF document text
    • http://chatik85939775.fun/75976104202lzp40.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rumezo/41175732985.pdfIn PDF document text
    • https://ec679cc6-872a-45a8-b2fd-b1bc8f6ddb77.filesusr.com/ugd/d1d005_d228dbd737a64e9b85f377a50c68adb0.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dikobepibelun/is_buying_penny_stocks_worth_it.pdfIn PDF document text
    • https://s3.amazonaws.com/zarelusipofox/whatsapp_gold_latest_version_for_android.pdfIn PDF document text
    • https://3a7b682b-4b85-4b21-836a-a34929c8735b.filesusr.com/ugd/0cd3a8_216e367210774fe7b9221d4b97cf682c.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/norozovijalu/beethoven_piano_sonata_18.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawe/psat_practice_test_1_answers_2016.pdfIn PDF document text
    • https://7f03322d-63d6-449b-a8c2-a80beffeb2b6.filesusr.com/ugd/2994dd_930dd73f3ad84adbb5de1045931dc8b6.pdf?index=trueIn PDF document text
    • https://bd7a0a6f-bbfd-49cc-ba41-c3f2778102d9.filesusr.com/ugd/9ea91e_e9ba39516a3949b783bf3a9d884a5f74.pdf?index=trueIn PDF document text
    • https://def26600-86c9-4442-a738-094ddf2992d1.filesusr.com/ugd/eb5a6a_d65eacbd83be49a5817bf2a6581e6847.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gofilafixu/bumowobuvam.pdfIn PDF document text
    • https://40e214c1-1950-44e8-a195-e2c6eeb23253.filesusr.com/ugd/a517f4_39b07993e50c4fb0bc5cfef9ff790e4e.pdf?index=trueIn PDF document text
    • https://42f4b946-f871-4f2a-a73e-6571c6569919.filesusr.com/ugd/e20521_b2ab686a32a347259a6ad8b1c9587879.pdf?index=trueIn PDF document text
    • https://16012499-1299-48b0-8cdd-5f23a7749958.filesusr.com/ugd/fafc38_d9e55ed6a0424e5fa0bfb8c7c5d1207b.pdf?index=trueIn PDF document text
    • https://5fa60de5-32ab-41ac-ba65-77330e21e623.filesusr.com/ugd/2e16aa_d58e3db763c64076aa95c511e3a0354d.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/matogapibelifiv/25937038178.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/dezefolimafewuvijituwox.pdfIn PDF document text
    • https://s3.amazonaws.com/livivuvuwugeb/44147370505.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_off0001075d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1075D 5428 bytes
SHA-256: 57b9777f3013192bbfbb0b31261da1534b6500573418074a2bc251cf655ccdd3
font_01_sfnt_off000119c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C4 11284 bytes
SHA-256: 2dee8998806751902bed973676a278b127b8fa6dc69871146dfc52bcc30188d5

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