Malicious PDF — malware analysis report

Static analysis result for SHA-256 c26982392bc9480a…

MALICIOUS

PDF

75.5 KB Created: 2021-03-23 22:56:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: dd59e30913c784148231c8a4fa8f3203 SHA-1: 552d1fc53950e6465dcbd5d2a477243787d213cf SHA-256: c26982392bc9480ae21bb9d91302b46769a9882b4e92af234757dc8a6e269b9c
126 Risk Score

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 0.9999

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://jottigo.ru/strik?utm_term=ielts+writing+task+1+samples+band+9+bar+chart PDF link annotation
    • http://mosomupusafebin.medianewsonline.com/how_long_does_a_ford_escape_hybrid_battery_last.pdfIn PDF document text
    • http://sidesevofexow.22web.org/actionair_fire_damper_installation_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/sumavevop/tuhijhO/regal_movie_theater_las_vegas_strip.pdfIn PDF document text
    • http://nifazafagikoxa.medianewsonline.com/52110014765.pdfIn PDF document text
    • https://cdn.sqhk.co/ranemagesoga/bwjicja/xuzezokiku.pdfIn PDF document text
    • http://pukujadud.getenjoyment.net/vitatetofezodebini.pdfIn PDF document text
    • http://4338bacchus.com/bookkeeping_template_for_restaurantrufk1.pdfIn PDF document text
    • http://italywom.space/wumaxudoninareridiroijeu8.pdfIn PDF document text
    • https://cdn.sqhk.co/vinogusi/ihiahiR/93044998661.pdfIn PDF document text
    • http://joblanc.xyz/what_is_bureaucracy_in_public_administrationkjd0l.pdfIn PDF document text
    • http://kersita.space/is_reiner_braun_goodcrire.pdfIn PDF document text
    • http://remontvorot24.com/vomafolirixapedokomuxalu67u0g.pdfIn PDF document text
    • http://sreview.online/31574662985nbmsg.pdfIn PDF document text
    • https://cdn.sqhk.co/wobuwozavenu/VyhbAof/nopiledug.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xijuroluzuka.epizy.com/splash_splash_love_episode_3.pdfIn PDF document text
    • http://litorow.myartsonline.com/2007_honda_civic_si_coupe_oil_capacity.pdfIn PDF document text
    • http://rufolexuvolup.epizy.com/solidworks_2020_with_crack_64_bit.pdfIn PDF document text
    • http://depolavebusep.rf.gd/22509558549.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_off0000e556.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE556 5928 bytes
SHA-256: f38324d6f799e0ef4ef94e0cdbde5d1f1b24c71226f0c3b1722c6762d8d9414a
font_01_sfnt_off0000f96c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF96C 11000 bytes
SHA-256: 2bf926e972b860ee4341826ee5991451a61032c4b8390fdcfdf397ef7a11d855

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