Malicious PDF — malware analysis report

Static analysis result for SHA-256 66c37b2ea2ebc457…

MALICIOUS

PDF

78.5 KB Created: 2021-03-26 10:15:59 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 1228da5bad41dc7eb3af1fbd3e780f90 SHA-1: 95d632fcbbe63fabd39bbb79c5e75f12185b084c SHA-256: 66c37b2ea2ebc457cef12a3a1a8819b7c32164f9b065f026e6563e2d6306e61e
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. 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 0.9998

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://soxebez.ru/wix?keyword=calidad+de+vida+definicion PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4414358/normal_601fd5d187b0c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385887/normal_601f9a9cb6728.pdfIn PDF document text
    • http://goossyy.online/66893501703t2pyn.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458623/normal_6047ef40e5341.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409244/normal_600fe464e0aaa.pdfIn PDF document text
    • http://skidki-day.shop/kidde_kn-cosm-ib_vs_kn-cosm-ibamtroz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459481/normal_601a30e68d540.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4374519/normal_5ff900fdde218.pdfIn PDF document text
    • http://makululi.iblogger.org/44923483790.pdfIn PDF document text
    • http://fitokaps.xyz/xawuzowenanakixuxejtb0pj.pdfIn PDF document text
    • http://the-job.ru/win_bet_app2dvso.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fegugeg.rf.gd/coindesk_state_of_blockchain_q1_2018.pdfIn PDF document text
    • https://s3.amazonaws.com/dosalapasenow/duzuvovorofarevilop.pdfIn PDF document text
    • http://ziboporo.epizy.com/whatsapp_status_video_love.pdfIn PDF document text
    • https://s3.amazonaws.com/nitizobuv/la_iliada_en_ingles.pdfIn PDF document text
    • https://s3.amazonaws.com/lixuduwonifa/bekegi.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_off0000f748.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF748 4704 bytes
SHA-256: 273a47ffb6568dd21a831295980edb4399c69b1e26d181261a301d06cb54d6aa
font_01_sfnt_off00010766.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10766 11632 bytes
SHA-256: 47ef5f070045c364e63bb91c07c74d614cbde55be28ba8164be029d8a2ce5c22

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