Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7111fbb097d5777…

MALICIOUS

PDF

79.7 KB Created: 2021-04-03 07:07:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: edb2a205e7061da5cfa4b51be56147ad SHA-1: 545edd5d08e8807a4f2c5270756d0d579fb6aa62 SHA-256: e7111fbb097d57777584a5d9f01d90376cf7e144f5878a0b5a69d0f938f9c8eb
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

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 0.9993

Heuristics 6

  • 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.
  • 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://jumiwimov.ru/strik?utm_term=instep+bike+trailer+stroller+kit PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4409000/normal_5fda548e4b8b1.pdfIn PDF document text
    • https://lasebotoxuxuxir.weebly.com/uploads/1/3/4/7/134729765/4695154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455405/normal_5fd0e3ca0b4a3.pdfIn PDF document text
    • https://tevufipe.weebly.com/uploads/1/3/1/6/131606546/kofoguxefobiven_tuvilanutulum_lobelusu_vitusobogulu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375204/normal_604e626264b56.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4471711/normal_603956ad7790d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4472486/normal_601a01081cf58.pdfIn PDF document text
    • http://nebatomefov.scienceontheweb.net/pamotedavigarotevetesulig.pdfIn PDF document text
    • http://woberate.getenjoyment.net/cardiac_rehab_phases.pdfIn PDF document text
    • http://jonipifenukiz.mygamesonline.org/9746471775.pdfIn PDF document text
    • http://lofokumado.22web.org/correct_address_format_netherlands.pdfIn PDF document text
    • https://budorezaru.weebly.com/uploads/1/3/4/8/134859022/fb107e9f1f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409113/normal_5fef7aa04295e.pdfIn PDF document text
    • https://zuvubexusemeto.weebly.com/uploads/1/3/4/3/134373725/5d51640077.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417140/normal_605118e794ec6.pdfIn PDF document text
    • http://larebalin.mypressonline.com/the_saxon_stories_tv_series.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413973/normal_604160a15b7b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://mimiwuzoxul.epizy.com/blue_eyes_video_song_videoming.pdfIn PDF document text
    • http://tifuponakeg.epizy.com/church_information_system_open_source.pdfIn PDF document text
    • http://girofili.myartsonline.com/beckman_coulter_access_2_brochure.pdfIn PDF document text
    • http://wafubarig.epizy.com/godakovijalasij.pdfIn PDF document text
    • http://kijemuf.epizy.com/lerabatedametomuw.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_off0000fb37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB37 4952 bytes
SHA-256: 0909d2a86980cb4aaebf6324f5b40fba07b26acdec4c86da5bc7db9384da3a2b
font_01_sfnt_off00010c1b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C1B 10772 bytes
SHA-256: 1decb5db61ca37a8fe97b78a5f96d0c11a3fc805e793936b865f7f118a9973f4

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