Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9ff7a6cd6079bab…

MALICIOUS

PDF

76.9 KB Created: 2021-03-27 19:11:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 113c271e7cb70b29177e4a95dec76bd8 SHA-1: 5f81a28d34a52b67566b117c2c1011f497cd27bb SHA-256: e9ff7a6cd6079babc8fc94a633d1728b7f27c15c86b83705d6ce3b2a762b00b9
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 0.9996

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://mezovuduw.ru/strik?utm_term=karr+alarm+honda PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4471250/normal_60228a2defcee.pdfIn PDF document text
    • http://luxisulejoxo.getenjoyment.net/vejamaletinunogizivepufev.pdfIn PDF document text
    • http://tramlaweq.online/affairs_cloud_current_affairs_august_20195823g.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4428033/normal_601ff867e8914.pdfIn PDF document text
    • http://dizurexemubegog.mygamesonline.org/what_is_the_reason_for_printer_offline.pdfIn PDF document text
    • http://prizyivnik.ru/deadlands_rpg_downloadq1yk0.pdfIn PDF document text
    • http://freedate18.xyz/bajiraxaxawebol6kqg9.pdfIn PDF document text
    • http://salet.store/65806100192odslo.pdfIn PDF document text
    • http://tideparipawovu.mygamesonline.org/93847875510.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367631/normal_604425b19a090.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4462708/normal_5ffc823a563b8.pdfIn PDF document text
    • http://magic-spring.com/73583040122zr8p0.pdfIn PDF document text
    • http://aycotoro6.xyz/14343919285n6olh.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369311/normal_5ff28374623e9.pdfIn PDF document text
    • http://lidlid.xyz/gekovojexijobajafapmjrmv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387826/normal_601363e1b9503.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492281/normal_5ff7ca9ec4848.pdfIn PDF document text
    • http://acupofjacob.com/how_to_download_sims_4_update41kqw.pdfIn PDF document text
    • http://okstore.info/wasomuziwudipi8uxav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472501/normal_601cf4c3c0847.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://futebowa.atwebpages.com/zekotatedado.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_off0000f179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF179 4856 bytes
SHA-256: dc9e423822dec1eb7b851d47a2b9469f6e3ce92655365af9e1a2601028296374
font_01_sfnt_off000101ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101CE 10708 bytes
SHA-256: 7e8232e2f0a3aa88868829d5530dc59784b30b26144996e25581412d719010a1

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