Malicious PDF — malware analysis report

Static analysis result for SHA-256 e43c93e4b66bdbf7…

MALICIOUS

PDF

91.9 KB Created: 2021-02-23 18:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 15036f2058ab7853ac44e9084f85a4f6 SHA-1: 91163cce4984f2dae17b744cd94f67e6e5895cbf SHA-256: e43c93e4b66bdbf7c087cfd7c2df416d3bd69ae52372423cea7b17bd6665bed6
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 0.9997

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://jottigo.ru/wix?keyword=die+bestimmung+2+free+download PDF link annotation
    • https://cdn.sqhk.co/titabofasika/8LgghdP/mini_ninjas_wii_controls.pdfIn PDF document text
    • https://cdn.sqhk.co/korulifesewa/TqdRidw/83660222944.pdfIn PDF document text
    • https://cdn.sqhk.co/videgogaf/cibo4gj/metazijazotasazagilut.pdfIn PDF document text
    • https://cdn.sqhk.co/jifigetuxu/fbrighj/71307650069.pdfIn PDF document text
    • http://tevuvisena.iblogger.org/33948791865.pdfIn PDF document text
    • https://cdn.sqhk.co/fefamuve/aMhiIhj/big_business_deluxe_happy_halloween.pdfIn PDF document text
    • https://cdn.sqhk.co/gorigaserata/hdQ1Fhc/wefujutawimilasu.pdfIn PDF document text
    • http://bedanixabij.22web.org/70653261860.pdfIn PDF document text
    • https://cdn.sqhk.co/tebefaravuz/jy6MMN0/46646719751.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tofaveme.epizy.com/17888630656.pdfIn PDF document text
    • https://s3.amazonaws.com/wovigebi/xuvojosaladaja.pdfIn PDF document text
    • http://wasomozonomevam.rf.gd/tevuliruzowagagumipatuni.pdfIn PDF document text
    • http://mekufajotifix.rf.gd/ganiwulugirabox.pdfIn PDF document text
    • https://s3.amazonaws.com/zikeko/google_analytics_academy_assessment_2_answers.pdfIn PDF document text
    • http://bejojawap.rf.gd/54612871683.pdfIn PDF document text
    • http://zepotusetazokor.rf.gd/bebebomotonufenonarila.pdfIn PDF document text
    • http://siwojanapav.epizy.com/71481432158.pdfIn PDF document text
    • https://s3.amazonaws.com/fadupazageraf/animals_farm_book.pdfIn PDF document text
    • http://roduteberilexel.epizy.com/triptico_de_alcoholismo_y_drogadiccion.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000112d4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x112D4 5588 bytes
SHA-256: 4a6ed6920d0ffbe29ded21c2e32b8aea00388255944b7773ec7c436a57e386b2
font_01_sfnt_off000125d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x125D1 11340 bytes
SHA-256: ca6b75fb35bde84d79555dd22a873448f93a9700d7ef74c8efbbe42d2f255cec
font_02_sfnt_off00014b5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B5B 16128 bytes
SHA-256: c6d15a48544a3bb55b86c8e7bdd0e7cb70a7a2427dd0dd016b970b4b8641d415

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