Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9b3cd610f673c3a…

MALICIOUS

PDF

116.3 KB Created: 2021-04-04 14:28:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 01361e16c9d6558fdb7a4ef4d63308dd SHA-1: 784afe3d1e4036e0cf2269311428461543df4cc2 SHA-256: e9b3cd610f673c3aabb224a525747930982c377a71f425fddbb74ab7b1b24bd8
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 0.9997

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 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/award?keyword=narasimha+kavacham+pdf+kannada PDF link annotation
    • http://gapilojazixo.getenjoyment.net/17079625148.pdfIn PDF document text
    • http://sethel.xyz/minn_kota_terrova_55_lb_54_i_pilot_bt_i-pilot_linkf4arj.pdfIn PDF document text
    • http://tijudiwulewanuw.getenjoyment.net/bargaining_theory_of_war.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387590/normal_60532295e22c2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476432/normal_6063af2186bd4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491946/normal_6064dabbb6336.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4415936/normal_5fc8783fddcab.pdfIn PDF document text
    • http://komarovskii.xyz/apocalypto_full_movie_hd_tamil8nf1u.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367925/normal_5fce92fc7d262.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421943/normal_602cdae45b1f9.pdfIn PDF document text
    • http://bivoliku.mywebcommunity.org/lefatotusipidozo.pdfIn PDF document text
    • https://kajuzenutojaso.weebly.com/uploads/1/3/4/6/134631714/zagidesiwukowo.pdfIn PDF document text
    • http://8bitbeardsco.com/32649134831atbqg.pdfIn PDF document text
    • https://beredixe.weebly.com/uploads/1/3/4/7/134762790/5729049.pdfIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e1a7809-b0f1-43a0-873f-4b19e25bb656/control_system_engineering_by_nagrath_and_gopal_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5969b039-6149-4820-8aac-d272c964605d/standards_for_mathematical_practices_posters.pdfIn PDF document text
    • http://jokodakive.onlinewebshop.net/arguably_hitchens.pdfIn PDF document text
    • http://dokudaruriwiv.atwebpages.com/toxarisutixijisiseguw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/23d64681-3750-4824-b1d0-e3ec947c88dc/26737966536.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00014fae.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x14FAE 48072 bytes
SHA-256: bcd80ede0a6a17e1e51444474872e414420012038e6f540de376d7d99bf398cd
font_00_sfnt_off00013d3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13D3C 5456 bytes
SHA-256: eff0b780de3ba8fe20983048850e5abfb01242197909fbe29f073732fa70348e
font_02_sfnt_off0001a1d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1A1D5 9904 bytes
SHA-256: ac7b51724693f0ce57bba5775eb379712f205cc9968e97e56f6879fd1a5207b4

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