Malicious PDF — malware analysis report

Static analysis result for SHA-256 482edfb6980e505d…

MALICIOUS

PDF

81.1 KB Created: 2021-01-28 12:42:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: a9f8f885b9869b96e1db56f2a3b615e7 SHA-1: 4cf572ad903fe9769b06924674756a8e3ffc7d17 SHA-256: 482edfb6980e505da0aa25c42f00ee625b53ae5fa08a039f0d7ee9645c11e4bb
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, many pointing to disposable domains and flagged as part of a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded links 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/123?utm_term=what+does+test+blueprint+do+in+skyblock PDF link annotation
    • https://fosevikotik.weebly.com/uploads/1/3/1/6/131637163/bufapotibuponovafa.pdfIn PDF document text
    • https://nugukijozagesek.weebly.com/uploads/1/3/0/7/130739433/b0650fe2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4446035/normal_600ecaba5bd47.pdfIn PDF document text
    • http://trokot-shopnew.online/90236164552mthtb.pdfIn PDF document text
    • http://swiss-gear.shop/82849340968qbt.pdfIn PDF document text
    • https://venevivoxeda.weebly.com/uploads/1/3/1/8/131857756/kutegu.pdfIn PDF document text
    • https://zevoxonigex.weebly.com/uploads/1/3/5/3/135300088/802aba5e6a68704.pdfIn PDF document text
    • https://jorosovepi.weebly.com/uploads/1/3/4/7/134706332/bubivemizu_rirebedodup.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/hiehcij/best_mud_tires_2018.pdfIn PDF document text
    • https://mitesevutij.weebly.com/uploads/1/3/4/7/134717039/2853756.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/LHibuhe/rumble_on_reviews.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388627/normal_60112bf851b26.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459621/normal_600dc1ece88f8.pdfIn PDF document text
    • http://baykamif.space/42267186700fjp0m.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://waruzav.epizy.com/articles_on_higher_education_in_pakistan.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_off0000e6a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6A2 5480 bytes
SHA-256: 13611a0c5fb141213b14bba9ccb5982ba1c7574972f901c3279a9b3f08c49260
font_01_sfnt_off0000f94e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF94E 11856 bytes
SHA-256: 6c09a047f959af0c779ba41c3663755dfa88a940b62fe8e3d43efd3d896e19e5
font_02_sfnt_off000121ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x121AC 16164 bytes
SHA-256: f469c5aa689aa4c1965481b78cfaebbf1c3ebdad2306c7067134b7b4aaa0addd

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